Bleeding without stool is the cause of anal lesions, commonly internal hemorrhoids, in addition to some proctitis or rectal malignant tumors can also occur without stool bleeding. 1. internal hemorrhoids: when the rectal submucosal venous plexus on the anal dentate line is enlarged and varicose and congested under a variety of factors, it is easy to cause blood in the stool and prolapse. When the hemorrhoidal mass is prolapsed, there will be bleeding without stool. 2. Proctitis: when infection and other factors cause rectal mucosa congestion, edema, fever, pain, mucus stool, anal bleeding and other symptoms. 3. Rectal malignant tumor: rectum mainly manifests in the change of bowel habit and the change of bowel character, such as increased frequency of defecation, constipation, and mucus, pus and blood stool. When rectal cancer is combined with hemorrhoids, there may be bleeding before or after stool, mostly bright red. Bleeding without bowel movement may also be seen in cases of anal trauma, anal sphincter injury with concomitant bleeding disorders of the bowel. Therefore, when bleeding without stool occurs, you should consult the hospital as soon as possible, complete the examination, make a clear diagnosis and then be treated accordingly.