When there is a difficult and painful bowel movement with blood, which is annoying, this is the phenomenon of anal fissure bleeding. Anal fissure is a disease in which the whole layer of the skin of the anal canal is cracked and a chronic ulcer is formed. The blood in the stool caused by anal fissure is bright red, with blood dripping out or after wiping with hand paper, and there is severe anal pain and pain after the stool, at which time it is anal fissure blood in the stool. It is characterized clinically by periodic anal pain, blood in the stool and constipation. What causes anal fissure then? Anal fissure is caused by excessive consumption of spicy and hot products, internal heat, heat knots in the intestines, or long term illness and weakness, deficiency of yin and blood, lack of fluid, intestinal loss of moistening, constipation, coarse and hard stool, defecation and struggle, rubbing the skin of the anus, repeatedly infected with evil toxins, long lasting, the formation of chronic ulcers, resulting in anal fissure, and then fissure blood in stool. The clinical symptoms of anal fissure and blood in stool are pain during defecation, bleeding, constipation, and itching. What are the pathological changes that slowly occur in anal fissure and blood in stool? 1. Ulceration. Initially, it is a longitudinal break in the skin of the anal canal, linear or prismatic, with soft and harmonious sides and a shallow and elastic bottom. 2. thickening of the pectineal membrane. The pectineal area is the narrowest area of the anal canal, and is a good area for anal comb sclerosis and anal canal narrowing. The thickened structure under the pectineal area is called the pectineal band, and the inflammatory stimulation of anal fissure can make it thicken and lose elasticity, touching the healing of anal fissure, so the thickened pectineal band should be cut off when treating anal fissure. 3. anterior sentinel hemorrhoid. The skin below the rupture is stimulated by inflammation, causing lymphatic and small venous reflux to touch the wall, causing edema and fibrous degeneration, building skin flaps of varying sizes, called anterior sentinel hemorrhoids, which are also connective structure external hemorrhoids. It is recommended to eat more fresh fruits, vegetables and coarse fiber food in your daily life, eat less or avoid spicy and stimulating diet, drink more water to ensure that the gastrointestinal tract has abundant digestive juice secretion, which is conducive to gastrointestinal peristalsis and prevents constipation. And keep the anal hygiene, after the stool should be timely cleaning the anus, diligent bathing, diligent change of underwear, can effectively prevent infection. The physical exercise is good for blood circulation, can harmonize the body’s qi and blood, promote gastrointestinal peristalsis, improve pelvic congestion, and prevent constipation.