Anal fissures are small ulcers formed after the skin layer of the anal canal below the dentate line is fractured. In contrast, surface fissures of the anal canal cannot be considered as anal fissures because they heal quickly on their own and are often asymptomatic. Anal fissure is a common anal canal disorder and a common cause of severe pain at the anal canal in young and middle-aged people. Anal fissures are most common in middle-aged people, but can also occur in the elderly and in children, generally slightly more in men than in women, although more women than men have been reported. Anal fissures often occur in the posterior and anterior middle of the anus, with the posterior part of the anus being the most common and the sides less common. The fissure is linear or prismatic, and if the anus is opened, the fissure becomes round or oval in shape. The main problem of anal fissure is dry stool and difficulty in defecation. The first step in care is to relieve mental worries. Some people postpone defecation for fear of anal pain during defecation, which is counterproductive because the longer it takes, the drier the stool becomes, which increases the pain of defecation. You should get into the habit of having a regular bowel movement, once a day, so that the stool will not be dry and the pain can be reduced. At the same time, drugs and food can be used to soften the stool and reduce the expansion of the anus, which can also reduce the pain during defecation. When taking laxatives, you should pay attention to the right amount. If the amount is too much, the stool will be too thin, and several bowel movements a day will increase the irritation to the anus. At the same time, you can not rely on drugs to help defecate, because drugs have certain side effects, laxatives a stop stool more constipation, easy to form a stubborn constipation, so that the anal fissure more and more serious. Therefore, the prevention and control of constipation can not rely on laxatives, to regulate the diet, dragon fruit, bananas, pears, apples, peaches, grapes, almonds, watermelon and other fruits, celery, spinach, leeks, sweet potato leaves, bamboo shoots, wild rice, bok choy and other vegetables, rich in fiber and vitamins, the appropriate amount of daily food can make the stool soft and easy to discharge, in order to reduce the stimulation of anal fissure wound, to promote healing. Stimulating foods such as wine, tobacco, guava, pomegranate, chili, squash, ginger, garlic, etc. should be avoided or eaten sparingly. Patients with constipation and anal fissures should drink more water, they need to drink 1-2 pots of water and eat 1-2 pounds of green vegetables a day. Because the smoothness of the stool or not depends on two elements a water, two fiber. The pain is mainly caused by the spasm of the internal sphincter muscle after a long period of anal fissure, and the physical effect of heat can make the spasm relieve the pain, which is a proven method, but the anal part must be soaked in hot water, both to relieve pain and wash the anal dirt, such as the conditions of the drug fumigation bath better. The anal fissure patients try to avoid rubbing with coarse bad paper, especially not left, right, front and back hard rub, or anal fissure just grow and heal a little bit of a rub and pull cracked, those who have the conditions after the warm water rinse, no conditions or work time defecation can use wet paper towels gently dip clean. Many lesbian anal fissures occur mostly in the postpartum period, because of the increase in the body of the uterus during pregnancy, rectal pressure, anal blood circulation is affected, postpartum pelvic void, intestinal cavity expansion, fecal collection; at the same time, the postpartum diet fine, lack of fiber, so that the stool dry; and because of postpartum bed, intestinal peristalsis slow, several days do not want to stool, resulting in constipation. When defecating, the dry and hard stool tears the anus and causes anal fissure. Therefore, during pregnancy and especially during the postpartum period, special attention should be paid to softening the stool and protecting the anus.