The actual type of fistula and the extent of the lesion should be taken into account as follows: a. Excision is good: for low simple anal fistula, even if the fistula is located low, even if it is completely cut or removed, it will not damage too much anal sphincter and cause post-operative anal incontinence, so for low simple anal fistula to excision surgery is good. The best way to get the most out of the situation is to take into account the type of disease you have, and you need to go to the hospital in time and do the relevant tests to clarify the type of anal fistula and then choose the appropriate surgery.