After the recovery of anal fistula surgery wound cracked again, may be constipation, strenuous physical exercise or trauma caused. 1. constipation: after anal fistula surgery, the majority of patients in two weeks, the wound slowly healing, some patients may need a month or so, the specific time varies from person to person, generally after surgery, patients should keep the bowel movement, in order to prevent the recurrence of the disease, such as patients do not pay attention to diet leading to dry stools, dry stools may be on the anus of the newly healed wound damage, resulting in the wound cracked again. 2. strenuous physical exercise: some patients in the anal fistula surgery, strenuous physical exercise can also lead to anal sphincter damage caused by anal fissure, making the just-healed wounds again collapse. 3. trauma: poor sexual habits such as anal sex or direct external pulling can lead to the patient’s newly healed anal skin tissue cracking. After anal fistula surgery, patients should avoid eating spicy and stimulating food, such as chili peppers, etc., at the same time to keep the anal area clean, so as to avoid infection, usually available in warm water and other sitz bath. After the recovery of anal fistula surgery, the wound and cracking may also be other reasons, it is recommended to go to the hospital in a timely manner, a clear cause to give treatment, so as not to delay the condition.