The main reason for the formation of anal fissures is prolonged constipation, dry stool, cut the skin mucosa when defecating, mainly manifested as pain in the anus after the stool, and can be accompanied by the symptoms of blood in the stool, when the symptoms of anal fissures are serious, the perianal sphincter is exposed, and the pain increases after stimulation. The more effective way to treat anal fissure is to solve the treatment of constipation, develop good bowel habits, defecate on time every day, eat more vegetables, fruits and other fiber-rich foods to soften the stool, pain can be treated with local pain medication, such as anti-inflammatory pain suppositories. If the symptoms of anal fissure are more serious, or the indications for surgery are obvious, choose the treatment of anal fissure removal or sphincter cutting. 2, pain after defecation can also be seen in thrombosed external hemorrhoids, due to local perianal vein thrombosis, can appear severe pain, also need timely surgery, usually try not to sit for a long time. 3, in addition, local pain after defecation, also seen after eating spicy stimulating food, usually The actual pain can be seen after eating spicy food, so try to pay attention to a light diet and try to go to a regular hospital before guiding the treatment.