The common causes of blood dripping from the stool are: internal hemorrhoids, intestinal polyps, anal fissure and so on. 1. Internal hemorrhoids: varicose vein mass occurs above the anal dentate line, the surface is covered with mucous membrane, there is often blood in the stool, and the congenital venous wall of the anal canal is weak, sedentary squatting, constipation, and other factors related to the fecal discharge, will cause tortuous expansion of blood vessels rupture, which will result in the manifestation of dripping blood in the stool. 2. Intestinal polyps: will make the intestinal lumen become narrow, resulting in defecation is squeezed, and feces will rub the mucous membrane of the polyp, resulting in mucous membrane damage, which in turn causes blood dripping from the stool. 3. Anal fissure: when the feces is too dry and hard, if the feces is too hard, it is easy to tear the perianal tissues and produce anal fissure. This will cause blood in the stool, accompanied by pain. All in all, if there is blood dripping from the stool, it is recommended to go to the hospital in time to get a clear diagnosis and symptomatic treatment. In daily life, we should also maintain a reasonable diet and bowel habits.