The most likely causes are anal fissure, internal hemorrhoids, rectal tumors and other diseases. They should be treated accordingly. 1. Anal fissure: most of the long time stool dryness cut the perianal mucous membrane, bleeding after breakage. Usually keep the stool smooth, you can eat laxative drugs, such as compound aloe vera capsule, lactulose oral solution and so on to soften the stool. You can also take Yunnan Baiyao capsule, Anluo blood and other medicines to stop bleeding when there is dripping blood. Warm water sitz bath every day, serious cases need surgery. 2. Internal hemorrhoids: internal hemorrhoids are relatively large, dry stools cut through the mucous membrane causing bleeding. Also need to eat laxative drugs, such as compound aloe vera capsule, bleeding is more, need to take oral Yunnan Baiyao capsule and other drugs to stop bleeding, grass carpenter rhizome flow infusion skin and other swelling medication. Pay attention to keep the bowel movement smooth, if necessary, surgical treatment. 3. Rectal tumor, with the gradual increase of tumor, defecation will also cut and bleed, this situation needs early surgery. Dribbling blood after defecation, as well as coagulation dysfunction, rectal polyps, constipation, etc., should be promptly to the hospital, after a clear diagnosis, then consider the treatment method.