What are symptoms of Anal Fistula?

Symptoms are usually a purulent discharge and drainage of pus and/or stool near the anus, which can irritate the outer tissues causing itching and discomfort. Pain occurs when fistulas become blocked and abscesses recur. Flatus (gas) may also escape from the fistulous tract. A fistula-in-ano is diagnosed when a probe has been passed between the opening on the skin’s surface and the interior opening.