Anal fissure is a laceration of the anal area, a chronic condition characterized by a full longitudinal splitting of the anal canal skin and the formation of infected ulcers. It is characterized by periodic anal pain, bleeding, and constipation. It is second only to hemorrhoids in the incidence of anal disorders. It can affect both men and women, and is usually found in the front and back of the midline of the anus, and is rare on both sides, with the posterior side of the anus being the most common. The majority of patients are young women between the ages of 20 and 40. Due to anatomical factors, it is more common for female patients to be located in the anterior midline. Anal fissures are more common in the 6 and 12 points of the truncated bladder; symptoms are mainly pain, bleeding and constipation, and they are mutually causal. 1, pain: is periodic, the pain increases during defecation, paroxysmal knife-like pain or burning pain, the pain decreases or disappears within a few minutes to more than ten minutes after defecation, called the pain interval. The pain then becomes severe due to persistent spasm of the sphincter muscle and often lasts for several hours before gradually relieving. Pain is also the main reason for most patients to visit the clinic. 2, bleeding: bleeding can be seen during stool, usually blood stained by hand paper or dripping blood, bright red, but the amount is small or only attached to the surface of the stool. Constipation: Patients often have habitual constipation, and dry stool often tears the skin of the anal canal and causes anal fissures.