Anal fissure is a painful burning or cutting pain when the stool passes through the anal opening, sometimes there is blood on the surface of the stool or blood drips from the anus, and after defecation the pain is slightly lighter or still severe, followed by a continuous unbearable pain for several hours or even a day. Anal fissure is a relatively common and stubborn anal disease that occurs in young women when the whole layer of the skin of the anal canal below the dentate line ruptures to form a chronic, poke-shaped ulcer with periodic pain. The disease occurs mostly in the posterior median part of the anus, but is less common in the anterior median part of the anus, and even less common on both sides. According to national census data, the onset of the disease is more common in young adults aged 20-30 years old, with more women than men. The high incidence of anal fissure in young people is probably due to the stronger contraction of the anal canal, higher sensitivity of the internal sphincter and easy spasm, as well as irregular diet and life, and more constipation. How to deal with constipation? In addition to good bowel habits, exercise, eat more fruits and vegetables rich in fiber and vitamins, you can often eat some sesame, honey, vegetable oil, walnuts, etc. These foods can moisten the intestines, the stool will not be stuck in the anus there can not get down. In addition, to drink less, do not eat spicy stimulating food, food should not be too fine, to coarse and fine grains with vegetables and other fiber-rich food intake as much as possible, can make the stool remain normal. If this is not possible, you can temporarily lubricate the stool with a corked solution, so that the anus is not under constant pressure. Also pay attention to timely treatment of various diseases that cause anal fissures, such as ulcerative colitis, to prevent anal fissures from occurring.