A fistula is an abnormal tunnel that forms between two body parts, often between the anal canal and the skin near the anus. It can cause pain, swelling, and discharge, and usually occurs after an abscess or infection.

Common Causes of Fistula

Chronic infections or abscesses

Inflammatory bowel diseases (like Crohn’s disease)

Previous surgeries or injuries

Tuberculosis or radiation therapy side effects

Symptoms You Shouldn’t Ignore

If you experience pain during bowel movements, pus discharge, swelling, or irritation around the anal area, it’s important to see a specialist immediately.