Is a small channel that can develop between the end of the bowel and the skin near the anus. An anal fistula can cause bleeding and discharge when passing stools - and can be painful. An anal fistula can occur after surgery to drain an anal abscess.
Recurrent anal abscesses
Pain and swelling around the anus
Pain with bowel movements
Bloody or foul-smelling drainage (pus) from an opening around the anus. The pain may decrease after the fistula drains.
Irritation of the skin around the anus due to persistent drainage
Fever, chills, and a general feeling of fatigue. (However, these may be symptoms of many conditions.)
Complete blood count (CBC)
Digital rectal examination
Stool analysis (coprogram)
Fecal occult blood test (FOBT)
Stool analysis - Protozoans and Helminths (microscopy)