After surgery, the healing process of the surgical wounds of anal fistula patients is required. Because the site of anal fistula surgery is special and at the end of the digestive tract, if the patient has diarrhea, and the number of diarrhea increases, it can lead to the following hazards: 1. 3. Long-term diarrhea will lead to a decrease in the patient’s physical condition, which will inevitably slow down the healing of the wound. Therefore, patients undergoing anal surgery must control their diet and regulate their bowel movements in order to promote the healing of anal surgery wounds.