There are many reasons for frequent bleeding in the stool, the first analysis of the color of blood in the stool, if the color of the stool is bright red, suggesting that the bleeding site is closer to the anus, common causes are: first, mixed hemorrhoids, especially internal hemorrhoids bleeding, hemorrhoids are varicose vein mass, increased abdominal pressure or constipation leads to swelling of hemorrhoidal vein stasis, hemorrhoidal vein stasis and the formation of hemorrhoids, blood in the stool is usually dripping or spraying, feces and blood The blood in the stool is usually in the form of drops or jets, with stool mixed with blood. The second, anal fissure, repeated dry stools can easily damage the skin of the anal canal leading to fissures, which can easily lead to blood on the surface of the stool when wiping it, bright red in color and generally small in amount. Third, rectal polyps and rectal adenomas, long-term stool irritation can easily lead to rupture of the submucosal blood vessels, thus causing bleeding. If the color of blood in the stool is dark red, it indicates that the site of bleeding is far from the anus and may be upper gastrointestinal bleeding, so gastroscopy, colonoscopy and, if necessary, small intestine capsule endoscopy should be performed to clarify the cause and site of bleeding.