The healing of the wound after anal fistula surgery takes about 40-60 days. This is because if a complete radical fistula is done, there is a relatively long incision that will cut directly from the external to the internal opening, leaving the wound directly open and requiring it to heal slowly. For small fistulas, complete healing will take about 40 days. If the wound is large, it may take longer to heal. The most important thing is to change the medication after the surgery, because the wound is easily contaminated by the stool, and the deeper wound is also prone to pseudo-healing, so you should insist on changing the medication every day after the fistula, to clean the wound, and to review the doctor regularly. The actual fact is that you will be able to prevent the phenomenon of false healing after the surgery, you must insist on changing the medicine.