Scarring after anal fistula surgery usually takes about six months to disappear, and is less likely to disappear if the patient has a scarred body. Because the anal fistula surgery process will be the lesion tissue removal, will form a wound, in the initial stage after surgery, due to the healing of the wound tissue and new tissue growth, will form a scar hard knot. As the condition gradually recovers, the tissue in the area will gradually soften and disappear in about six months. If the patient belongs to the scarred body, once there is a small wound on the body, the small wound will gradually form scar tissue, the local skin tissue bulges and deepens in color. Therefore, the hard knots that appear after surgery in patients with scarring constitution are usually difficult to disappear. Scar tissue can be removed surgically if necessary. It is recommended that patients with scarring should consult a doctor in a timely manner and be treated with medication or surgery as prescribed by the doctor.