Long-term stool bleeding, there are five main possibilities: First, hemorrhoids, a common rectal perianal disease, clinical manifestations are anal dripping blood after stool, the surface of the stool with bright red blood. Second, anal fissure, common in patients with long-term constipation or bedridden, clinical manifestations are blood dripping from the anus after stool, accompanied by severe pain in the anus. Third, rectal cancer, early stage can have no obvious characteristic performance, when the disease progresses to advanced stage, blood in the stool, black stool, may be accompanied by diarrhea, stool unformed symptoms. Fourth, rectal adenomas or polyps, when dry stool damage rectal adenomas, polyps mucosal blood vessels, can appear in the stool mixed with fresh blood. Fifth, gastroduodenal ulcer bleeding, will not cause bright red blood stool, clinical manifestations are mostly black stool, accompanied by regular abdominal pain. When there is blood in the stool, you should promptly go to a regular hospital for gastroenteroscopy to clarify the site and cause of bleeding, and carry out reasonable treatment under the guidance of a specialist.