Anal fissure occurs on the 21st day after anal fissure resection and needs timely treatment. The main treatment program is divided into conservative treatment, such as medication, warm water or potassium permanganate sitz baths, adjusting bad habits, etc. If the symptoms of conservative treatment is ineffective or the symptoms of heavy patients need to actively perform surgical treatment. 1. Conservative treatment: for patients after recurrence, early mild anal fissure can be treated by active conservative treatment, most of them can recover in a few weeks, 1:5000 potassium permanganate solution sitz bath can improve the symptoms, relieve the pain, regular defecation. For patients with obvious local pain, they can use local analgesics, such as lidocaine gel, etc. In terms of diet, try to be as light as possible, avoid spicy and stimulating food. 2. Surgery: For patients who have recurrence of anal fissure, conservative treatment is ineffective, and the local symptoms are very serious, surgical treatment is needed. At present, the mainstream surgical methods include anal flap surgery and internal anal sphincter amputation, etc. The cure rate and prognosis are better, and standardized postoperative care is needed to ensure the prognosis. Patients with recurrent anal fissure need to develop a good habit of living, carry out standardized post-surgical care under the guidance of the doctor to reduce the possibility of recurrence, and actively cooperate with the doctor’s treatment.