Surgery for anal fissures is relatively short, usually about half an hour, but anesthesia and anesthesia preparation time are required before the surgery, and the overall time may add up to about an hour. Surgery for anal fissures is usually not major surgery and is routine. There are more surgical options, commonly used are anal fissure removal surgery or internal sphincterotomy, etc. If the patient has no significant local pain, anal fissure excision can be used to remove the old scar and the fresh wound may heal on its own. For patients with significant local pain and very severe constipation, internal sphincterotomy is recommended, and a light diet is needed to maintain soft stools after surgery.