Anal fissure generally can not be self-healing. Anal fissure is mostly caused by mechanical damage to the anal mucosa due to dry stool, difficult defecation, etc. It is categorized into acute anal fissure and chronic anal fissure. The symptoms of anal fissure are mainly pain, bleeding and constipation. It is necessary to go to the hospital, according to the clinical manifestations, visual diagnosis, anoscopy and other examinations, according to the results of the examination to take appropriate treatment. If acute lesions, need to actively treat constipation, keep the bowel movement, protect the ulcer wound, prevent infection, can be cured. If the anal fissure fails to be treated in time, repeated attacks, easy to lead to chronic anal fissure, need to use surgical therapy. During the treatment of anal fissure, it is necessary to develop good living habits, usually avoid eating spicy stimulating food, eat more vegetables, fruits, drink more water, keep the bowel movement, other diseases caused by anal fissure, to actively treat the primary disease.