Perianal Abscess: Causes and the Power of Drainage

A Perianal Abscess is a common, treatable pocket of pus that builds up near the anus. The cause in 90% of cases is a simple biological event: a tiny, normal anal gland gets blocked, trapping bacteria and leading to infection. Diagnosis is usually quick and straightforward based on the painful, swollen red bump visible during a physical exam. The definitive cure is immediate surgical drainage (a tiny cut to release the pus and pressure). The wound is left open to heal from the inside out. Post-procedure care involves sitz baths. Antibiotics are generally unnecessary for simple abscesses in healthy individuals, as drainage removes the source of infection. It is noted that about one-third of people who have an abscess drained may later develop an anal fistula (a persistent tunnel).