Frequent blood in stool without pain, if it is a young person, most likely due to bleeding hemorrhoids; if it is the elderly, you also need to rule out intestinal polyps and intestinal tumors caused by bleeding. 1. If the blood often does not hurt, and the color is bright red, for the paper with blood or defecation blood, and stool does not mix, it is very likely to be anal disease hemorrhoids due to bleeding. 2. Frequent blood in stool without pain may also be due to larger colorectal polyps, the bleeding in this case is mixed with stool, and the color is dark red. 3. In addition, if the color of blood in stool is dark red or dirty blood, and mixed with stool, it is very likely that the bleeding is caused by colorectal tumor, the most common one is rectal cancer, but patients with rectal cancer not only have the symptom of blood in stool, but also have other symptoms such as thinning and dilution of stool, and increase in the number of stools. If the amount of blood in stool is large and frequent, it is recommended to consult anorectal department of regular hospital as soon as possible, so as to avoid hemorrhagic anemia due to prolonged blood in stool and to find out the cause of the disease and diagnose and treat it as soon as possible.