Do sitz baths help an anal fissure heal?

Name: Do sitz baths help an anal fissure heal?
Published: 2026-10-05

In adults with an acute or chronic anal fissure, do warm sitz baths improve healing, pain or recurrence compared with usual care or other treatments?

Compiled 2026-10-05 · checked 2026-10-05 · next 2026-11-05 · automated review, how it works

Bottom line

It's unclear whether warm sitz baths speed up healing of an anal fissure beyond other conservative care — the trials that tested this directly don't agree with each other.

Two small trials that added sitz baths on top of otherwise identical care found no significant difference in healing or pain, though one found higher patient satisfaction and another found less burning after surgery. A separate trial comparing a sitz-bath-plus-bran routine against topical ointments found a higher healing rate with the sitz-bath routine, but it wasn't tested against no sitz bath at all. No trial has compared sitz baths with doing nothing.

How certain

Low

One well-conducted randomised trial addresses this question directly. The studies disagree with one another, so the overall certainty is lower than any single one of them.

What it shows

Unclear

The studies point in different directions.

studies found: 23studies found
randomised trials: 9randomised trials
people studied: 5,836people studied
reviews of trials: 2reviews of trials
years covered: 1986–2024years covered
finished, never published: 2finished, never published

What the research shows

Fissure healing
Results conflict. When sitz baths were added to otherwise identical care, healing was not significantly different. But a trial comparing a sitz-bath-based routine against topical ointments found a higher healing rate (87%) with the sitz-bath routine, and a systematic review found around 80% healing with sitz baths compared with higher healing from surgery.[1,2,3]
Insufficient evidence
Recurrence
No study in this table measured whether fissures came back after healing with sitz baths.
Not studied
Anal sphincter pressure
No study in this table measured anal sphincter pressure (muscle tightness around the anus) in relation to sitz baths.
Not studied

What it may help with

In one trial, people recovering from fissure surgery who used sitz baths reported significantly less anal burning after bowel movements, though overall pain scores were not different.[1]
In one trial, patients reported higher satisfaction with sitz baths added to usual care, even though measured healing and pain scores were not significantly different.[1]
A trial comparing a sitz-bath-plus-bran routine with topical ointments found a higher healing rate (87%) with the sitz-bath routine.[1]
In the trials that tested sitz baths directly, no side effects were reported.[1]

Important limitations

Most studies gave sitz baths to every patient in every group as part of standard background care, so they cannot show whether sitz baths themselves made any difference — the effect of sitz baths can't be separated from the other treatments given alongside them.[1,2,3,4,5,6,7,8]
Only a couple of trials isolated sitz baths by comparing a sitz-bath group with a no-sitz-bath group while keeping everything else the same, and these were small (46–58 people) and low quality.[1,2]
The trials that do address this question directly disagree with each other, which is the main reason certainty is low.[1,2,3]
Several of the sources included are general review articles that simply restate sitz baths as standard first-line care without reporting any actual study data or numbers.[1,2,3,4,5,6,7]
A large Cochrane review included sitz baths among dozens of compared treatments across 75 trials, but its abstract does not separate out a specific result for sitz baths alone.[1]

What the studies found

Found a benefit5 · 22%
Found no clear effect3 · 13%
Mixed or unclear15 · 65%

What kind of studies

Randomised trial9 · 39%
Narrative review7 · 30%
Prospective cohort2 · 9%
Systematic review1 · 4%
Laboratory study1 · 4%
Meta-analysis1 · 4%
Case series1 · 4%
Retrospective1 · 4%

The studies that decided it

Alnasser et al. 2022
The Efficacy of Sitz Baths as Compared to Lateral Internal Sphincterotomy in Patients with Anal Fissures: A Systematic Review
Helps healing but surgery heals more.Systematic reviewLow quality
11 people2022
sitz baths helped healing (around 80% recovery) and pain relief with no reported side effects, but lateral internal sphincterotomy had higher healing rates
Who was studied
people with anal fissures
What they received
sitz baths
Compared with
lateral internal sphincterotomy (a surgical cut to the anal muscle)
Main outcome
healing, pain relief, and side effects from sitz baths
Quality
The review combines findings from many different studies without statistical pooling, so its conclusions are descriptive rather than rigorously quantified.
Limitations
A quality assessment reduced 551 screened articles to only 11 included studies, and evidence on pain relief was described as conflicting.
Taken word for word from the abstract
- n leaving 11 articles
- population An anal fissure is a common condition that affects patients of all ages.
- intervention a sitz bath
- comparator lateral internal sphincterotomy
- primaryOutcome Four aspects of sitz bath outcomes were evaluated in the articles.
- result most articles had similar recovery rates of around 80%
- result the recovery rates of lateral internal sphincterotomy are superior to those of conservative treatment, including sitz baths
- result no studies reported side effects from the sitz baths
Cureus · PMID 36337820 · Read it on PubMed ↗
Nelson et al. 2012
Non surgical therapy for anal fissure
No specific result reported.Meta-analysisVery low qualityRelated question
5,031 people2012
the abstract lists sitz baths as one of many agents compared across 75 trials but does not report a specific healing result for sitz baths alone
Who was studied
people with anal fissure (acute, chronic, and in children)
What they received
sitz baths
Compared with
other non-surgical treatments, placebo, or surgery
Main outcome
whether the fissure healed
Quality
the review combines many different therapies and trials but gives no specific data, numbers, or comparison results for sitz baths on its own.
Limitations
the abstract does not separate out sitz bath results from the many other therapies studied, so no specific effect size or statistical comparison for sitz baths is given.
Taken word for word from the abstract
- n so the final number of participants is 5031.
- intervention Sitz baths
- population Chronic fissure, acute fissure and fissure in children are included in the review.
- primaryOutcome Dichotomous outcome measures included Non-healing of the fissure (a combination of persistence and recurrence), and Adverse events
- comparator Comparison groups may include an operative procedure, an alternate medical therapy or placebo.
- result Seventeen agents were used (nitroglycerin ointment (GTN), isosorbide mono & dinitrate, Botulinum toxin (Botox), diltiazem, nifedipine (Calcium channel blockers or CCBs), hydrocortisone, lignocaine, bran, minoxidil, indoramin, clove oil, L-arginine, sitz baths, sildenafil, "healer cream" and placebo) as well as Sitz baths, anal dilators and surgical sphincterotomy.
Cochrane Database Syst Rev · PMID 22336789 · Read it on PubMed ↗
Büyükyavuz et al. 2010
Efficacy of lanolin and bovine type I collagen in the treatment of childhood anal fissures: a prospective, randomized, controlled clinical trial
Added lanolin or collagen healed more fissures than sitz baths alone.Randomised trialLow qualityRelated question
71 people4 weeks
68% healed with sitz baths/analgesic/stool softener alone, versus 92.9% with added lanolin and 100% with added collagen; the difference was significant
Who was studied
children with acute anal fissure
What they received
topical lanolin ointment or bovine type I collagen spray, added on top of warm sitz baths, analgesic cream, and stool softeners
Compared with
warm sitz baths, analgesic cream, and stool softeners alone (no added ointment)
Main outcome
complete healing of the anal fissure at 4 weeks
Quality
small, open-label trial without blinding, so results could be biased and are hard to apply broadly.
Limitations
Open-labeled design (no blinding), small group sizes, and all groups also received sitz baths, so this trial does not isolate the effect of sitz baths alone.
Taken word for word from the abstract
- n Seventy-one children with acute anal fissure were divided randomly into three groups
- population Seventy-one children with acute anal fissure
- intervention Patients in groups II and III were also treated with topical lanolin ointment and bovine type I collagen, respectively.
- comparator All children were assigned to have warm sitz baths, topical analgesic creams, and stool softeners.
- primaryOutcome Complete healing of the anal fissure was observed in 68% of the group I patients, but in 92.9% and 100% of the group II and III patients, respectively.
- result The difference among groups was significant in terms of complete fissure healing (P = 0.003), but the efficacy of topical lanolin ointment and bovine type I collagen spray did not differ significantly (P = 0.078).
Surg Today · PMID 20676860 · Read it on PubMed ↗
Maestre et al. 2010
[Cold or hot sitz baths in the emergency treatment of acute anal pain due to anorectal disease? Results of a randomised clinical trial]
No difference between hot and cold baths.Randomised trialLow qualityRelated question
24 people7 days
no significant difference in pain control between cold and hot sitz baths
Who was studied
adults with acute anal pain from hemorrhoids or anal fissures
What they received
sitz baths with cold water (below 15°C)
Compared with
sitz baths with hot water (above 30°C)
Main outcome
pain level and quality of life after 7 days
Quality
very small study (24 patients) mixing hemorrhoid and fissure patients, looking at pain relief rather than fissure healing.
Limitations
Small sample size (only 24 randomised patients), combined hemorrhoid and fissure patients, and outcome measured was pain/quality of life rather than fissure healing.
Taken word for word from the abstract
- n Of the 27 eligible patients, 24 were randomised (Group 1: n=12 y Group 2: n=12).
- population patients with acute anal pain due to haemorrhoids or anal fissures
- intervention Group 1: Sitz baths with water at a temperature of less than 15 degrees C
- comparator Group 2: Baths with a water temperature above 30 degrees C
- primaryOutcome An analysis was made of the pain at 7 days (visual analogue scale), quality of life (SF-36), anal at-rest pressure and disease progress.
- result There were no statistical differences in pain, but it remained stable in Group 1, but gradually decreased in the patients of Group 2
Cir Esp · PMID 20580349 · Read it on PubMed ↗
Gupta 2007
Effects of warm water sitz bath on symptoms in post-anal sphincterotomy in chronic anal fissure--a randomized and controlled study
Less burning, no pain difference.Randomised trialLow qualityRelated question
46 peopleone week
no significant difference in pain scores between groups, but significantly less anal burning in the sitz bath group, and a non-significant trend toward better improvement scores
Who was studied
patients recovering after surgery (sphincterotomy) for chronic anal fissure
What they received
warm water sitz bath twice daily plus fiber and pain medicine
Compared with
fiber and pain medicine alone, no sitz bath
Main outcome
pain level, anal burning after bowel movements, and symptom improvement measured on a visual analog scale
Quality
Small trial of only 46 post-surgical patients looking at symptom relief, not fissure healing itself, so results may not generalize to healing of an untreated fissure.
Limitations
Small sample size; studies post-operative symptom relief after sphincterotomy rather than fissure healing in unoperated patients; improvement score difference did not reach statistical significance.
Taken word for word from the abstract
- n Forty-six patients were randomly assigned
- population improving upon a patient's postoperative symptoms after a closed lateral sphincterotomy
- intervention a twice-daily sitz bath along with identical fiber and analgesics (sitz bath group)
- comparator analgesics and fiber supplement alone (control patients)
- primaryOutcome A 24-h pain score--post-defecation anal burning and symptom improvement--was evaluated on a visual analog scale (VAS)
- result No significant difference in mean pain score between groups (p = 0.284) was noticed after one week. However, the patients from the control group experienced significant anal burning compared with patients from sitz bath group (p < 0.0001). The improvement score was higher in the sitz bath group when compared with the control group; however, it did not reached a statistically significant level.
World J Surg · PMID 17534541 · Read it on PubMed ↗
Gupta 2006
Randomized, controlled study comparing sitz-bath and no-sitz-bath treatments in patients with acute anal fissures
No real improvement in healing or pain.Randomised trialLow quality
58 people4 weeks
no significant difference in healing or pain relief, though satisfaction was higher with sitz baths
Who was studied
patients with acute anal fissures
What they received
sitz baths (soaking in warm water) plus psyllium husk
Compared with
no sitz baths, psyllium husk alone
Main outcome
pain scores and fissure healing
Quality
small trial with some dropouts and no significant effect on the main outcomes of healing or pain
Limitations
only 52 of 58 patients completed the trial; pain and healing differences did not reach statistical significance
Taken word for word from the abstract
- n Fifty-eight subjects were recruited for this study.
- population To determine the efficacy and safety of sitz baths in the management of acute anal fissures.
- intervention Individual patients were randomized to either receive sitz baths or no sitz baths for 4 weeks in addition to oral psyllium husk.
- comparator Individual patients were randomized to either receive sitz baths or no sitz baths for 4 weeks in addition to oral psyllium husk.
- primaryOutcome Main outcome measures were validated pain scores and levels of satisfaction.
- result There were no significant differences in fissure healing between the two groups over the 4-week study period.
- result Although the pain score was lesser in the sitz bath group than in the control group, it failed to reach statistical significance.
ANZ J Surg · PMID 16916391 · Read it on PubMed ↗
Jensen 1986
Treatment of first episodes of acute anal fissure: prospective randomised study of lignocaine ointment versus hydrocortisone ointment or warm sitz baths plus bran
Sitz baths plus bran healed fissures best.Randomised trialModerate quality
103 peoplethree week
sitz baths plus bran gave faster symptom relief and highest healing rate (87%) versus 60% with lignocaine and 82.4% with hydrocortisone; by 3 weeks symptom relief was similar across groups
Who was studied
adults with a first episode of acute anal fissure
What they received
warm sitz baths plus unprocessed bran
Compared with
lignocaine ointment or hydrocortisone ointment
Main outcome
symptom relief and fissure healing after 3 weeks
Quality
it was a randomised trial but small, with some patients dropped for not following the protocol, which can affect the reliability of results
Limitations
seven patients withdrawn for protocol non-adherence; healing assessed only up to three weeks
Taken word for word from the abstract
- n One hundred and three patients with an acute first episode of posterior anal fissure were randomised
- population patients with an acute first episode of posterior anal fissure
- intervention warm sitz baths combined with an intake of unprocessed bran
- comparator lignocaine ointment (n = 33) versus hydrocortisone ointment (n = 35)
- primaryOutcome symptomatic relief was significantly better among patients treated with sitz baths and bran
- result Patients treated with lignocaine, however, had significantly fewer healed fissures (60%) than patients treated with hydrocortisone (82.4%) or warm sitz baths and bran (87%).
Br Med J (Clin Res Ed) · PMID 3011180 · Read it on PubMed ↗

What actually helps, on this site

More about the condition:

Anal Fissure

All 23 studiesEvery study that answered the question, with its design, size and result.

The other 16 studiesEverything else the search returned, including anything retracted.

Sharma et al. 2024
Comparative Evaluation of Effects of Oral Diltiazem and Topical Diltiazem (2%) Ointment in the Treatment of Chronic Anal Fissure: A Prospective Randomized Study
Compared diltiazem forms, not sitz baths alone.Randomised trialLow qualityRelated question
50 people6 weeks
topical ointment gave better pain relief at 1 week, no difference in pain at 6 weeks, but better fissure healing with topical ointment at 6 weeks
Who was studied
adults with chronic anal fissure
What they received
oral diltiazem (plus sitz bath and stool softeners)
Compared with
topical 2% diltiazem ointment (plus sitz bath and stool softeners)
Main outcome
pain relief and fissure healing after treatment
Quality
Small group sizes (25 per arm) and no detail on blinding make the comparison hard to rely on.
Limitations
Small sample size; abstract does not describe blinding or how randomization was done; sitz bath was used as a background conservative measure in both groups rather than being the treatment under study.
Taken word for word from the abstract
- n Group A (n=25) received treatment in the form of oral diltiazem, while group B (n=25) received treatment
- population patients with chronic anal fissures
- intervention oral diltiazem
- comparator 2% (weight/volume) diltiazem ointment for local application in addition to other conservative methods like sitz bath and stool softeners
- primaryOutcome Pain relief was significantly better in group B than in group A at the end of the first week
- result Pain relief was significantly better in group B than in group A at the end of the first week (P=0.00018), but at the end of 6th week, no significant difference was observed. Fissure healing was more significant in group B than in group A after 6 weeks (P=0.0152).
Middle East J Dig Dis · PMID 39386341 · Read it on PubMed ↗
Lyle et al. 2024
Anal fissures: An update on treatment options
No evidence reported either way.Narrative reviewVery low quality
size not given2024
Abstract states sitz baths are part of first-line conservative therapy for acute anal fissure, but does not report outcome data
Who was studied
people with anal fissures
What they received
sitz baths (warm water soaks) plus dietary fibre
Compared with
no comparator described
Main outcome
fissure healing/treatment success
Quality
This is a general narrative review summarising guidelines and does not present any original data or outcome results for sitz baths.
Limitations
No study data, outcomes, or effect sizes are reported for sitz baths specifically; this is a general overview article.
Taken word for word from the abstract
- population Anal fissure (AF) is the second most common anorectal complaint in healthcare settings.
- intervention Acute AF is first treated with conservative therapy, including dietary fibre and sitz baths.
- comparator Addition of topical nitrates, topical calcium channel blockers or botulinum toxin injection is indicated with failure of conservative treatment or at medical discretion.
- primaryOutcome Surgical options are considered if AF persists despite treatment.
- result Acute AF is first treated with conservative therapy, including dietary fibre and sitz baths.
Aust J Gen Pract · PMID 38316476 · Read it on PubMed ↗
Mosleh et al. 2021
Anti-Inflammatory Activity and Quality Control of Erysimum cheiri (L.) Crantz
No human fissure data; lab-only study.Laboratory studyVery low qualityRelated question
size not given2021
Wallflower extracts showed strong anti-inflammatory activity in a lab test compared to diclofenac sodium, with root and flower extracts most potent
Who was studied
not a patient population — in vitro laboratory study of wallflower (Erysimum cheiri) plant extracts
What they received
wallflower plant extracts (root, flower, aerial parts, seed) tested for anti-inflammatory activity in vitro
Compared with
diclofenac sodium (anti-inflammatory drug) as reference comparator in lab assay
Main outcome
anti-inflammatory activity measured by albumin denaturation assay, plus plant quality control characteristics
Quality
This is an in vitro lab study of plant extracts with no human participants and no anal fissure patients, so it cannot show whether sitz baths help fissures heal.
Limitations
In vitro albumin denaturation assay only; no human trial; anal fissure is only mentioned as a traditional use context, not tested; no sitz bath intervention was actually studied.
Taken word for word from the abstract
- population screen in vitro anti-inflammatory activity of wallflower and perform quality control and characterization tests for different organs of the herb
- intervention albumin denaturation activity, macroscopic and microscopic, phytochemical, HPTLC, and FT-IR characteristics were investigated
- comparator Wallflower showed strong anti-inflammatory activity compared to diclofenac sodium
- primaryOutcome The present study is aimed to screen in vitro anti-inflammatory activity of wallflower and perform quality control and characterization tests for different organs of the herb
- result Wallflower showed strong anti-inflammatory activity compared to diclofenac sodium. The root (1.25, 2.5, and 5 mg/mL) and flower (10 mg/mL) extract exhibited higher anti-inflammatory activities than that of other plant organs at the same concentrations.
Biomed Res Int · PMID 34212031 · Read it on PubMed ↗
Patkova et al. 2020
Anal Fissure in Children
No specific result reported.Narrative reviewVery low quality
size not given2020
abstract does not report specific results or data for sitz baths; only states they are recommended as part of first-choice conservative therapy
Who was studied
children with anal fissure
What they received
sitz baths (as part of conservative management)
Compared with
no specific comparator stated for sitz baths alone
Main outcome
healing of the anal fissure
Quality
this is a general narrative review that does not present original data, trial results, or a specific finding about sitz baths on their own.
Limitations
abstract does not describe study methods, controls, or specific outcomes for sitz baths; it is a general review statement
Taken word for word from the abstract
- population Anal fissure is a common clinical problem in children
- intervention Conservative management with stool softeners, topical analgesics, and sitz baths is recommended as first-choice therapy.
- primaryOutcome prevents healing of the fissure
- result Conservative management with stool softeners, topical analgesics, and sitz baths is recommended as first-choice therapy.
- comparator which is associated with a marginally higher success rate than placebo
Eur J Pediatr Surg · PMID 32920798 · Read it on PubMed ↗
Emile et al. 2017
Does the duration of symptoms of anal fissure impact its response to conservative treatment? A prospective cohort study
Combined treatment helped; sitz-bath effect unclearProspective cohortLow qualityRelated question
60 people6 weeks
healing was significantly better in acute fissure (80%) than chronic fissure (40%), and healing rates fell from 100% in those with symptoms under one month to 33.3% in those with symptoms over six months
Who was studied
adults with acute or chronic anal fissure
What they received
combined conservative treatment including bulking agents, sitz baths, and topical glyceryl trinitrate (GTN) 0.2%
Compared with
patients with acute fissure (shorter symptom duration) versus patients with chronic fissure (longer symptom duration)
Main outcome
fissure healing rate, pain score, and constipation score at 6 weeks
Quality
this study combined sitz baths with bulking agents and GTN cream without a group that omitted sitz baths, so it cannot show what sitz baths alone contributed, and there was no untreated comparison group.
Limitations
no isolated sitz-bath arm, no untreated or placebo control group, small sample, and treatments were given together so individual contributions cannot be separated
Taken word for word from the abstract
- population sixty patients with acute or chronic anal fissure
- intervention treated conservatively with bulking agents, Sitz baths, and topical glyceryl trinitrate (GTN) 0.2%
- comparator The mean pre-treatment VAS for acute fissure was significantly higher than chronic fissure
- primaryOutcome Pain and constipation were assessed prior to treatment and at 6 weeks after therapy using visual analogue scale (VAS) and Wexner constipation score
- result Patients with acute fissure achieved significantly better healing than chronic fissure (80% Vs 40%). Healing rates decreased from 100% in patients with symptoms < one month to 33.3% in patients with symptoms >6 months.
- n sixty patients with acute or chronic anal fissure
- followUp assessed prior to treatment and at 6 weeks after therapy
Int J Surg · PMID 28629768 · Read it on PubMed ↗
Joda et al. 2017
Efficacy of nitroglycerine ointment in the treatment of pediatric anal fissure
Adding nitroglycerine helped more than usual careRandomised trialLow qualityRelated question
105 people8 weeks
the nitroglycerine group had higher rates of symptom relief and fissure healing than the conservative-care-only group, differences were statistically significant
Who was studied
children with anal fissure, ages 4 months to 5 years
What they received
nitroglycerine ointment added to standard conservative care (sitz bath, stool softener, local anesthetic)
Compared with
standard conservative care alone (sitz bath, stool softener, local anesthetic)
Main outcome
symptom relief and fissure healing
Quality
small, unequal-sized groups from a single hospital, and the study did not isolate sitz baths since both groups received them alongside other treatments.
Limitations
Unequal randomization (70 vs 35), single-center design, and sitz bath was part of background care in both arms rather than the tested variable.
Taken word for word from the abstract
- population The average age of patients was 2years (range, 4months to 5years).
- population 105 pediatric patients with anal fissure
- intervention chemical sphincterotomy with 0.2% NTG ointment was used in 35 patients, and was applied at the anal canal twice daily for 8weeks
- comparator Both groups were treated with classical conservative therapy of sitz bath, stool softener, and local anesthetic.
- primaryOutcome The primary outcomes of symptomatic improvement and healed fissure, as well as side effects, were analyzed.
- result Patients in the NTG group had 77% symptomatic relief and 60% healed fissure compared to the control group, which had 54% and 32.8% respectively. All were statistically significant.
- n included 105 pediatric patients with anal fissure
J Pediatr Surg · PMID 28410787 · Read it on PubMed ↗
Beaty et al. 2016
Anal Fissure
Review mentions sitz baths, no specific data.Narrative reviewVery low qualityRelated question
size not given2016
half of all patients with fissures healed with nonoperative management including sitz baths
Who was studied
people with anal fissures
What they received
sitz baths (along with high fiber diet and pharmacological agents)
Main outcome
fissure healing
Quality
This is a general narrative review chapter, not a study testing sitz baths specifically, so it can't show whether sitz baths themselves caused healing.
Limitations
Sitz baths are mentioned only as one part of a bundle of nonoperative treatments; no separate data or comparison for sitz baths alone is given.
Taken word for word from the abstract
- population Anal fissure (fissure-in-ano) is a very common anorectal condition.
- intervention nonoperative management such as high fiber diet, sitz baths, and pharmacological agents
- primaryOutcome Half of all patients with fissures heal with nonoperative management
- result Half of all patients with fissures heal with nonoperative management such as high fiber diet, sitz baths, and pharmacological agents.
Clin Colon Rectal Surg · PMID 26929749 · Read it on PubMed ↗
Fargo et al. 2012
Evaluation and management of common anorectal conditions
Not studied for fissures here.Narrative reviewVery low qualityRelated question
size not given2012
abstract lists onabotulinumtoxinA, topical nitroglycerin, and topical calcium channel blockers as effective treatments for anal fissures, but sitz baths are not mentioned for fissures — only for simple anorectal fistulas
Who was studied
patients with common anorectal conditions, including anal fissures
What they received
sitz baths
Compared with
other treatments such as onabotulinumtoxinA, topical nitroglycerin, or topical calcium channel blockers
Main outcome
effective treatment for anal fissures
Quality
this is a general narrative review of anorectal conditions, not a study testing sitz baths for fissures, and it gives no original data on that specific question.
Limitations
the abstract does not evaluate sitz baths as a treatment for anal fissures specifically; it mentions sitz baths only in the context of simple anorectal fistulas, and does not report a study design, sample size, or outcome data for fissures and sitz baths.
Taken word for word from the abstract
- intervention Simple anorectal fistulas can be treated conservatively with sitz baths and analgesics
- result Effective treatments for anal fissures include onabotulinumtoxinA, topical nitroglycerin, and topical calcium channel blockers.
- population The prevalence of benign anorectal conditions in the primary care setting is high
- comparator Effective treatments for anal fissures include onabotulinumtoxinA, topical nitroglycerin, and topical calcium channel blockers.
- primaryOutcome Effective treatments for anal fissures include onabotulinumtoxinA, topical nitroglycerin, and topical calcium channel blockers.
Am Fam Physician · PMID 22534276 · Read it on PubMed ↗
Gupta 2010
Supportive therapies in ano-rectal diseases--are they really useful?
No clear answer given.Narrative reviewVery low qualityRelated question
size not given2010
the paper discusses advantages and pitfalls but does not state a clear finding on effectiveness
Who was studied
people with common anal disorders such as hemorrhoids, anal fissure and fistula
What they received
supportive therapies such as sitz baths, local applications, and diet/lifestyle changes
Compared with
no comparator specified
Main outcome
whether supportive therapies are beneficial
Quality
This is a narrative discussion paper without original data, trial results, or a systematic search, so it cannot show whether sitz baths work.
Limitations
No original data, no systematic methodology, and it covers fissures, hemorrhoids and fistula together rather than fissures alone.
Taken word for word from the abstract
- population various ano-rectal pathologies
- intervention local applications, sitz baths, modification in the diet and life style
- comparator But are these supportive therapies really beneficial or they are just empirical?
- primaryOutcome But are these supportive therapies really beneficial or they are just empirical?
- result summarizes the advantages and pitfalls of these treatment additives
Acta Chir Iugosl · PMID 21066990 · Read it on PubMed ↗
Piccinni et al. 2009
Botox for chronic anal fissure: is it useful? A clinical experience with mid-term follow-up
No specific sitz bath data.Prospective cohortVery low qualityRelated question
60 people24 months
29 of 60 patients (48.33%) healed after the first botulinum toxin injection; 20 more healed after a second injection, while 11 needed surgery
Who was studied
patients with chronic anal fissure
What they received
botulinum toxin injection combined with hygiene measures including sitz baths, Vaseline oil and water intake
Compared with
no control group; outcomes compared before and after treatment only
Main outcome
healing of the anal fissure
Quality
This was a small, open-label study with no comparison group, so it cannot show whether sitz baths themselves helped healing.
Limitations
Non-comparative, open-label design; sitz baths were only one part of a combined hygiene regimen alongside the main treatment (botulinum toxin), so their individual effect cannot be determined.
Taken word for word from the abstract
- n sixty patients were enrolled in our Unit of Coloproctology
- population chronic anal fissures
- intervention After inoculation hygiene measures (sitz baths, Vaseline oil and water intake) were recommended
- comparator The study design was an open label non-comparative prospective trial
- primaryOutcome to verify the effectiveness of this treatment in relieving symptoms and healing fissures without relapse
- result In 29 pts the fissure was healed (48.33%) after the first injection; 31 patients (51.6%) were re-treated; 20 pts presented a complete healing of the fissure
Acta Biomed · PMID 20578418 · Read it on PubMed ↗
Gupta 2004
Current treatment options for fissure-in-ano
Does not address sitz baths.Narrative reviewVery low qualityRelated question
size not given2004
Surgery is still recommended as the preferred treatment after drug treatments fail, but the abstract does not discuss sitz baths at all
Who was studied
people with anal fissures (acute and chronic)
What they received
various surgical and pharmacological treatments for anal fissure (not specifically sitz baths)
Compared with
different treatment methods compared to each other
Main outcome
cure rates and complications of fissure treatments
Quality
This is a general review of fissure treatments that never mentions or evaluates sitz baths, so it provides no evidence on the specific question.
Limitations
The abstract is a general narrative review of surgical and pharmacological fissure treatments and does not address sitz baths or warm water soaks at all.
Taken word for word from the abstract
- population Fissure-in-ano is a painful condition that affects a sizable majority of the population.
- intervention a number of surgical and pharmacological methods that relax the anal muscle
- comparator The present study discusses various techniques advocated for the treatment of acute and chronic fissure-in-ano.
- primaryOutcome details of cure rates and possible complications
- result Surgery still remains the preferred option which should be offered to patients with relapse or therapeutic failure with prior pharmacological treatment.
J Med Liban · PMID 15881700 · Read it on PubMed ↗
Weinstein et al. 2004
[A prospective, randomized double-blind study on the treatment of anal fissures with Nitroglycerin ointment]
Nitroglycerin added no extra benefit.Randomised trialLow qualityRelated question
48 people2004
No significant difference was found between the groups regarding healing or pain relief
Who was studied
patients suffering from chronic anal fissure
What they received
Nitroglycerin ointment (0.2% or 0.4%) combined with stool softeners and sitz baths
Compared with
placebo ointment combined with stool softeners and sitz baths
Main outcome
fissure healing and pain relief
Quality
It was a small, double-blind randomized trial but nearly a third of patients dropped out, which weakens confidence in the result.
Limitations
Small sample size (48 patients), high dropout rate (31%), and all groups also received sitz baths and stool softeners, so the trial cannot isolate the effect of sitz baths alone.
Taken word for word from the abstract
- n encompassing 48 patients suffering from chronic anal fissure
- population patients suffering from chronic anal fissure
- intervention Nitroglycerin ointment
- comparator group I--0% (placebo)
- primaryOutcome Healing, pain relief and adverse events were evaluated
- result No significant difference was found between the groups regarding healing (p=0.952) or pain relief (p=0.458-0.8 according to the type of pain checked).
- limitations there was no benefit regarding healing or pain relief, in treating patients suffering from an anal fissure with Nitroglycerin ointment in combination with stool softeners and sitz baths, compared to the same treatment without Nitroglycerin ointment.
Harefuah · PMID 15521346 · Read it on PubMed ↗
Ansaloni et al. 2002
Oral lacidipine in the treatment of anal fissure
Mostly healed, but effect unclearCase seriesVery low qualityRelated question
21 people2 months
19 of 21 fissures (90.4%) healed after 28 days of combined treatment
Who was studied
patients with anal fissure
What they received
oral lacidipine plus warm sitz baths
Compared with
none (no control group)
Main outcome
healing of the anal fissure
Quality
This was a small, uncontrolled study of 21 patients with no comparison group, so it cannot show whether sitz baths themselves contributed to healing.
Limitations
No control or comparator group, small sample size, and sitz baths were given alongside oral lacidipine so their individual effect cannot be separated.
Taken word for word from the abstract
- n Twenty-one consecutive patients
- population consecutive patients (16 women, 76.2%) with AF
- intervention treated with oral lacidipine (6 mg daily) and warm sitz baths for 28 days
- comparator adding only stool softeners for patients with constipation
- primaryOutcome fissure healing were monitored at 14 days, 28 days and 2 months
- result a total of 19 (90.4%) after 28 days: among the healed AF no recurrences were seen at the 2-month control
Tech Coloproctol · PMID 12402050 · Read it on PubMed ↗
Tander et al. 1999
A prospective, randomized, double-blind, placebo-controlled trial of glyceryl-trinitrate ointment in the treatment of children with anal fissure
Nitroglycerin ointment helped, not sitz baths tested.Randomised trialModerate qualityRelated question
65 people8 weeks
26 of 31 (83.9%) healed with GTN versus 6 of 17 (35.2%) with placebo, a statistically significant difference
Who was studied
children with anal fissure
What they received
glyceryl-trinitrate (GTN) ointment applied to the anal canal
Compared with
placebo ointment (and separately lidocaine ointment)
Main outcome
complete healing of the fissure
Quality
It was a randomized, double-blind, placebo-controlled trial, but it was small and tested an ointment, not sitz baths.
Limitations
The abstract does not mention sitz baths as a tested intervention; it only lists them as part of usual background care, and the trial itself examined GTN ointment versus lidocaine and placebo.
Taken word for word from the abstract
- population Sixty-five children with anal fissure were divided randomly into 3 groups.
- intervention 0.2% GTN
- comparator either 0.2% GTN, 10% lidocaine, or placebo
- primaryOutcome Complete healing of the fissure occurred
- result Complete healing of the fissure occurred in 26 of 31 (83.9%) patients treated with GTN, 7 of 14 (50%) patients treated with lidocaine, and 6 of 17 (35.2%) treated with placebo.
- n Sixty-five children with anal fissure were divided randomly into 3 groups.
- followUp the study was ended after 8 weeks
J Pediatr Surg · PMID 10626860 · Read it on PubMed ↗
Janicke et al. 1996
Anorectal disorders
Said to help, no evidence given.Narrative reviewVery low quality
size not given1996
described as adequate treatment for most anal fissures, but no data or statistics given
Who was studied
people with anorectal disorders including anal fissures
What they received
sitz baths, stool softeners, and analgesics
Compared with
no comparator stated
Main outcome
healing or resolution of anal fissure
Quality
This is a general review article with no study data, numbers, or methods supporting the claim about sitz baths.
Limitations
No original data, no patient numbers, no comparison group, and no description of study methodology; general clinical review statement only.
Taken word for word from the abstract
- population Anal fissures are one of the most common causes of anorectal pain.
- intervention Most anal fissures are adequately treated by a medical approach using sitz baths, stool softeners, and analgesics.
- comparator If the anal fissure becomes chronic and is not responsive to medical therapy, a lateral sphincterotomy of the internal anal sphincter is the surgical procedure of choice.
- primaryOutcome Most anal fissures are adequately treated by a medical approach using sitz baths, stool softeners, and analgesics.
- result Most anal fissures are adequately treated by a medical approach using sitz baths, stool softeners, and analgesics.
Emerg Med Clin North Am · PMID 8921768 · Read it on PubMed ↗
North et al. 1996
The management of infectious and noninfectious anorectal complications in patients with leukemia
No fissure-specific sitz bath result givenRetrospectiveVery low qualityRelated question
83 people1996
86% of the 92 anorectal complications resolved without surgery; the abstract does not give a fissure-specific healing rate for sitz baths
Who was studied
patients with leukemia who developed anal and rectal problems during treatment, including 22 with anal fissures
What they received
non-surgical treatment (described as antibiotics and sitz baths for infected problems, general non-surgical care for non-infected problems like fissures)
Compared with
surgery (incision and drainage)
Main outcome
whether the anal/rectal problem resolved without surgery
Quality
this is a retrospective chart review in leukemia patients lumping fissures together with abscesses, hemorrhoids and ulcers, with no fissure-specific outcome data and no control group for sitz baths alone.
Limitations
Retrospective design, results pooled across several different anorectal conditions rather than reported separately for fissures, no untreated or alternative-treatment comparison group, and the study population (immunocompromised leukemia patients) differs from typical anal fissure patients.
Taken word for word from the abstract
- n A retrospective review of the medical records of 83 patients with acute or chronic leukemia
- population 22 patients with anal fissures
- intervention Nonoperative intervention in the form of systemic antibiotics and sitz baths is successful in the treatment of infectious anorectal complications.
- comparator Incision and drainage should be performed when fluctuation is present and in patients whose complications fail to respond to medical therapy.
- primaryOutcome Overall, 79 (86 percent) of the 92 anorectal complications resolved in 68 of the 83 patients.
- result Noninfectious anorectal complications in patients with leukemia respond to nonoperative intervention and rarely progress to a life-threatening infection.
J Am Coll Surg · PMID 8843260 · Read it on PubMed ↗

How we searchedThe exact query, the date it ran, and what came back — so you can run it yourself.

Searched: PubMed · ClinicalTrials.gov · Crossref on 2026-10-05
The exact search — paste this into PubMed to repeat it: ("Fissure in Ano"[Mesh] OR "anal fissure"[tiab]) AND ("sitz bath"[tiab] OR "sitz baths"[tiab] OR "warm water"[tiab] OR "Baths"[Mesh]); PubMed expanded that to: ("Fissure in Ano"[MeSH Terms] OR "anal fissure"[Title/Abstract]) AND ("sitz bath"[Title/Abstract] OR "sitz baths"[Title/Abstract] OR "warm water"[Title/Abstract] OR "Baths"[MeSH Terms])
What came back: 39 records found · 39 read · 23 answered the question
Included: Human, animal or laboratory studies reporting an outcome relevant to the question
Excluded: Records about a different condition or intervention
Records reporting no outcome
Retracted publications, which are listed but excluded from every count
Limits: Details were read from abstracts, not full papers, so anything reported only in a paper's methods section is not captured here.
Fields were read from abstracts, not full text, so detail reported only in a paper's methods section is not captured.
Evidence strength is adapted from the GRADE framework. It is not a GRADE assessment and was not produced by a GRADE panel.

39records came back from the search
39were read
23actually answered the question

Risks and safetyReported side effects and who should be careful.

No side effects from sitz baths were reported in the studies that tested them directly.

Why people try thisThe reasoning behind the question — not a claim that it works.

Warm water soaks feel soothing on painful, irritated skin around the anus.
Doctors commonly suggest sitz baths as a simple first step before trying medicines or surgery.
It's cheap, easy to do at home, and has a long-standing reputation as a home remedy.
People want to avoid stronger medication or surgery if they can.

Common questionsShort answers, drawn from the same studies.

Will a sitz bath heal my fissure?: Based on these studies, it's unclear. Some trials found no difference in healing or pain when sitz baths were added to care, while another found higher healing with a full sitz-bath routine compared with ointments. No trial has compared sitz baths against doing nothing at all.
Should I stop taking sitz baths?: There's no need to stop. No harm from warm sitz baths was reported in these studies, and some people found them soothing or more satisfying, even when measured healing wasn't different.
What actually heals anal fissures, based on these studies?: Treatments like topical nitroglycerin, diltiazem, and botulinum toxin injection showed clearer evidence of healing in some trials, usually used alongside sitz baths and stool softeners. Surgery healed more fissures than sitz baths alone in one review.
How did the studies have people do a sitz bath?: Soaking the anal area in warm water, generally described as above 30°C, for short periods, often a few times a day. One trial found no extra benefit from using cold water instead of warm.
Why do the studies disagree?: Most studies gave sitz baths to everyone, so they couldn't test sitz baths on their own. The few trials that did isolate sitz baths found no healing benefit, while a different trial comparing a whole sitz-bath routine to ointments found better healing with the sitz-bath routine.

This is information, not advice

This page summarises published research. It cannot tell you what is happening in your own body, and evidence changes. If something is bleeding, painful, or new, it is worth being looked at — that is a different question from the one on this page, and a better one to bring to a consultation.

Contact the office

Automated evidence review — PubMed, ClinicalTrials.gov, Crossref. Search strategy, grading rules and the checks that must pass before anything publishes were written by Allen Kamrava, MD, MBA, FACS, FASCRS, colon & rectal surgery, Beverly Hills. The pages themselves are compiled by software running that method and are not read one by one before publication — saying otherwise would be the one claim here that could not be checked.

Allen Kamrava, MD, MBA, FACS, FASCRS · 435 N. Bedford Dr., Suite 308, Beverly Hills, CA 90210 · 424.279.8222

Educational information — not medical advice.