A fistula is a tiny channel or tract that develops in the presence of inflammation and infection. It may or may not be associated with an abscess. The channel usually runs from the rectum to an opening in the skin around the anus.

Symptoms

• A throbbing, constant pain
• Irritation of skin around the anus
• Evidence of pus or blood when passing stools

Causes

• Anal abscess
• Tuberculosis
• Cancer of the rectum, etc.

Treatment

• Fistulectomy excision of whole of the fistulous tract from external opening to internal opening. It is laid open or sutured primarily.