① Diet: After surgery, patients should eat light, easily digestible food and avoid spicy, tobacco, alcohol and other stimulating foods. Generally, 2 to 3 days after surgery, it is appropriate to enter flour, lotus root powder, vegetable soup and other semi-fluid food, and about 1 week can take appropriate Chai fish soup to facilitate wound healing. ② Stool: control not to defecate within 48 hours after surgery. For the first stool, defecation can be done after enema in the hospital. In this way, the stimulation of the wound by stool can be reduced, and the occurrence of postoperative complications such as bleeding, edema and pain can be reduced. If the stool is difficult to pass, once in several days, you can take some laxative drugs under the guidance of the doctor. ③ Removal of stitches: Patients with anal fissures who have used lateral sutures are usually removed in 5 to 7 postoperative days. Before removing the sutures, do not take a sitz bath to avoid bacteria penetrating deeper into the tissues along the sutures, causing infection and the formation of perianal abscesses that do not heal over time. ④Medication change: Post-operative patients, after daily stools and sitz baths, should undergo local medication change treatment in a specialized hospital. In areas where medical conditions are poor, patients should also have daily local drug changes at home by their family members or by themselves under the guidance of a doctor, in order to play a role in eliminating decay and promoting early wound healing.