After anal fistula surgery, the main concern is how to change the medication and care for the wound at home by yourself? The most important thing is to change the medication and regular review after anal fistula surgery, if not handled properly will affect the wound healing or recurrence. The following are post-operative precautions: 1. Because anal fistula is an infected wound, generally not sutured, is open, so that the trauma slowly heal, it takes about a month. It is normal for the wound to be painful and bleed a small amount for about a week after surgery, so you should pay attention to your bowels, not dry and hard and diarrhea. 2, the first day after surgery to change the medicine is more painful, it is best to change the medicine before taking off the gauze (inside the oil gauze can not move) with potassium permanganate topical tablets sit bath for five minutes, and then come to the office to change the medicine will not be too painful. 4, anal fistula must be regularly reviewed after surgery, if there is uneven growth of granulation, pseudo-healing, you can deal with early. 5, the trauma is not completely healed, because there is no skin protection, will secrete, this is a normal phenomenon, do not worry.