Bleeding caused by hemorrhoids often does not mix with feces and is bright red, but there can also be blood in the stool, dripping blood, and blood stained on hand paper. However, it is not possible to assert – based on these conditions – that fresh blood in the stool is bleeding from hemorrhoids. In addition to hemorrhoids, the following diseases can cause blood in the stool. 1.Colorectal cancer The blood in the stool in the early stage of colorectal cancer may appear as a small amount of fresh blood covering the surface of the stool. With the development of the disease, the amount of blood in stool will gradually increase, and the phenomenon of thinning stool and intestinal obstruction may also occur. According to statistics, colorectal cancer is the most common disease that causes blood in the stool. 2, ulcerative colitis This disease causes blood in the stool, the blood color or bright or dark, mostly mixed with feces. There can also be mucus and pus in the stool. Patients with this disease often have abdominal pain, diarrhea and other symptoms. 3, colorectal polyps Colorectal polyps have single or multiple occurrence. The blood in the stool of this disease is characterized by intermittent occurrence of blood in the stool, bright red blood, small amount, and not mixed with feces. Some patients have small fleshy masses (polyps) that come out of the anus during defecation and then retract into the rectum after defecation. 4, anal fissure, anal canal mucous membrane injury Anal fissure is the most common cause of blood in the stool in children. They are accompanied by painful symptoms after defecation. In adults, anal fissures are mostly caused by long-term constipation. The blood in the stool caused by anal fissure is fresh, and a small amount of blood can be seen on the surface of the stool or on hand paper during defecation, or there may be fresh blood dripping down. 5. Colonic vascular dysplasia Blood in the stool caused by colonic vascular dysplasia has more bleeding and is bright red in color.