Post-Hemorrhoidectomy Pain Syndrome

What is Post-Hemorrhoidectomy Pain Syndrome?

Post-hemorrhoidectomy pain syndrome is a form of chronic functional anorectal pain that develops after an otherwise uncomplicated hemorrhoidectomy. It is characterized by persistent or recurrent rectal pain lasting for months, well beyond the typical 2- to 4-week recovery period. The pain is often described as a deep, dull ache, pressure, or spasm high in the rectum. This condition is a diagnosis of exclusion, meaning other causes of pain like an unhealed wound, anal fissure, abscess, or anal stenosis must be ruled out. It shares many features with other functional anorectal pain disorders like Levator Ani Syndrome and is thought to involve spasm or dysfunction of the pelvic floor muscles.

Common Symptoms

The primary symptom is persistent anorectal pain that begins after a hemorrhoidectomy and continues for more than 3 months.

• Pain Characteristics: The pain is typically a dull, aching, or pressure-like sensation located high in the rectum.
• Triggers: The pain is often aggravated by sitting for long periods and may be temporarily relieved by walking or lying down.
• Associated Symptoms: Patients may also experience a sensation of incomplete evacuation or pain during and after bowel movements, even with soft stools.
• Psychological Impact: Due to its chronic nature, the pain can lead to significant emotional distress, anxiety, and a reduction in quality of life.

What causes Post-Hemorrhoidectomy Pain Syndrome?

The exact cause is not fully understood, but it is believed to be multifactorial, involving both muscular and neurological components that are triggered by the surgical procedure.

• Pelvic Floor Muscle Spasm: The leading theory is that the surgical trauma of a hemorrhoidectomy can lead to chronic spasm and tension in the pelvic floor muscles, particularly the puborectalis and levator ani muscles.
• Nerve Injury or Irritation: The extensive dissection involved in a hemorrhoidectomy can potentially injure or irritate small sensory nerves in the anal canal, leading to a chronic neuropathic pain state.
• Scar Tissue: The formation of scar tissue in the anal canal can lead to altered sensation and function, which may contribute to muscle spasm and pain.
• Psychological Factors: Pre-existing anxiety or stress may predispose some individuals to develop a chronic pain syndrome after surgery.

How is the syndrome diagnosed?

This is a diagnosis of exclusion. The most important step is a careful physical examination to rule out other structural causes for the pain.

• Physical Examination: A gentle digital rectal examination is key. The provider will assess for any wound problems, fissures, or stenosis. A key finding that suggests a functional pain syndrome is tenderness when gentle pressure is applied to the levator ani or puborectalis muscles.
• Anoscopy or Proctoscopy: Visual inspection of the anal canal and rectum is performed to ensure the surgical sites have healed properly and there are no other visible abnormalities.
• Anorectal Manometry: This test can be useful to assess the function of the anal sphincter and pelvic floor muscles. In patients with functional anorectal pain, it may show an elevated resting anal pressure or paradoxical contraction of the pelvic floor muscles during attempted defecation (dyssynergic defecation).
• Imaging: Endoanal ultrasound or pelvic MRI may be used in select cases if there is suspicion of a deep abscess or other complex structural problem, but they are not routinely needed.

How is the syndrome treated?

Treatment is focused on relaxing the pelvic floor muscles and managing the chronic pain. A multidisciplinary approach is often most effective.

• Pelvic Floor Physical Therapy and Biofeedback: This is often the most successful treatment. A specialized physical therapist can teach relaxation exercises and use internal massage techniques (Thiele's massage) to release muscle trigger points. Biofeedback helps patients learn to consciously control and relax their pelvic floor muscles.
• Sitz Baths: Regular warm water soaks can help reduce muscle spasm and provide symptomatic relief.
• Medications:
  • Muscle Relaxants: Oral medications like diazepam can help reduce muscle spasm.
  • Neuropathic Pain Agents: Medications such as gabapentin or amitriptyline can be effective in managing chronic nerve-related pain.
• Botulinum Toxin (Botox) Injections: Injecting Botox directly into the tender pelvic floor muscles (levator ani or puborectalis) can provide significant pain relief by temporarily paralyzing the muscle and breaking the pain-spasm cycle. Multiple injections over time may be necessary.
• Pain Management Consultation: For refractory cases, a consultation with a pain management specialist may be beneficial to explore other options like nerve blocks.

Self-Care and Lifestyle

Managing this chronic pain condition involves active patient participation.

• Avoid Constipation: Maintaining soft, regular bowel movements with a high-fiber diet and plenty of fluids is crucial to avoid straining, which can aggravate pelvic floor muscle spasm.
• Ergonomics: Avoid sitting for prolonged periods on hard surfaces. A coccyx cushion or donut cushion can help relieve pressure on the pelvic floor.
• Stress Management: Techniques like mindfulness, meditation, and gentle exercise can help manage the anxiety and stress that often accompany chronic pain conditions.
• Stretching: Gentle pelvic stretching exercises, as guided by a physical therapist, can help maintain muscle flexibility and reduce tension.

Is it normal to have pain months after a hemorrhoidectomy?
No. While hemorrhoidectomy is known to be a painful operation, the acute surgical pain should resolve within a few weeks. Pain that persists for 3 months or more is considered chronic and is not a normal part of the recovery process. It requires further evaluation by your doctor.

Will I need another surgery to fix this?
Generally, no. Post-hemorrhoidectomy pain syndrome is a functional disorder of the muscles and nerves, not a structural problem that can be fixed with another operation. In fact, further surgery in the area could potentially worsen the pain. The treatment is focused on non-surgical therapies like physical therapy, medication, and injections.

How is this different from Levator Ani Syndrome?
Post-hemorrhoidectomy pain syndrome is essentially a form of Levator Ani Syndrome that is specifically triggered by a hemorrhoidectomy. The symptoms, underlying cause (pelvic floor muscle spasm), and treatments are virtually identical. The key difference is the clear temporal relationship to the surgical procedure.

• Atkin GK, Suliman A, Vaizey CJ. Patient characteristics and treatment outcome in functional anorectal pain. Dis Colon Rectum. 2011;54(7):870-5.
• Rao SS, Bharucha AE, Chiarioni G, et al. Functional Anorectal Disorders. Gastroenterology. 2016;150(6):1430-1442.e4.
• International Foundation for Gastrointestinal Disorders. Functional Anorectal Pain Disorders. Published November 14, 2020. Accessed October 12, 2025.