What we call anal fistula refers to a type of disease caused by inflammation of the anal sinuses inside the anus. It mainly consists of an internal opening, a tract, and an external opening.
When it comes to the duration of anal fistula surgery, anal fistulas are further classified into simple and complex anal fistulas, as well as low - lying and high - lying anal fistulas.

Generally, for a low - lying and simple anal fistula, the surgery usually takes 15 to 20 minutes.
If it is a high - lying and complex anal fistula, the surgery generally lasts between 30 and 45 minutes.
