Overview
An anal fistula often develops after an abscess has drained. It rarely heals on its own and usually needs surgery.
Symptoms
- Discharge of pus or blood near the anus
- Pain and swelling, especially when sitting
- Skin irritation around the anus
- Repeated abscesses
Causes and risk factors
Most fistulas follow an anal abscess. Other causes include Crohn's disease, tuberculosis and previous surgery or radiotherapy.
Diagnosis
A doctor examines the area. An MRI or ultrasound may be used to map the tunnel before surgery.
Treatment
Surgery is the main treatment. The type of operation depends on how the fistula runs in relation to the anal muscles, to cure it while protecting bowel control.
When to see a doctor
See a doctor if you have ongoing discharge, pain or repeated swelling around the anus.
This information is for general education and does not replace advice from a qualified doctor. For a medical emergency, call +92-51-8446666 or go to the nearest emergency department.
