Generally speaking, anal fissures are not contagious. In addition to blood in the stool, anal fissures are often accompanied by anal pain, which can last for several hours in severe cases and is very painful. Patients often try to relieve the pain by holding back the stool for a long time and reducing the number of bowel movements, but the result is that the stool stays in the large intestine longer and the water is reabsorbed and becomes more dry and hard. It is a common disease that occurs in autumn and winter. Anal fissures are caused by the fracturing of the entire mucous membrane of the anal canal and the formation of acute and chronic ulcers. It is easy to check for anal fissures by gently separating the patient’s anus with your hand and finding a typical fissure at the posterior midline of the anal canal. The cause is mainly due to bad bowel habits, especially in the dry climate of autumn, and less water, and not enough fresh vegetables and fruits, often leading to constipation or dry stools, hard pieces of feces can cut through the anus and anal fissures occur. The key to preventing anal fissures is to solve constipation. Drinking water therapy has long been the most effective and inexpensive way to prevent constipation. According to the physiological needs of adults, the daily intake of fluids should reach 2,000-3,000 ml, which is particularly important in the dry autumn climate. Drinking can be plain water, light salt water, honey punch and soup before and after meals. It is not advisable to drink too much strong tea or drinks containing caffeine. Because the tannic acid in tea can astringent stool; and caffeine has a diuretic, accelerating the role of water loss. In terms of diet, it is advisable to eat more food with high crude fiber content, such as fresh vegetables, fruits, sweet potatoes, cereals, etc.. Coarse fiber food can soften the stool, increase the amount of feces, and stimulate colon peristalsis. Some patients with anal fissures can have their symptoms relieved by the above methods alone. The physiological time to defecate is in the morning after waking up or after breakfast. After a night of digestion and absorption, the stool has been stored in the sigmoid colon. The “rise reflex” produced by waking up and the “gastrocolic reflex” produced after breakfast can increase the peristaltic wave of the colon and increase the intracolonic pressure, resulting in the desire to defecate. At this time, it is possible to pass stool smoothly without increasing abdominal pressure. Therefore, in normal life, you should arrange the time reasonably well and develop good bowel habits.