Pulling blood bright red without pain indicates that the bleeding site is mostly in the rectum within the anal dentate line. Commonly may be associated with internal hemorrhoids, rectal polyps, rectal tumors, coagulation disorders and so on. 1. Internal hemorrhoids: mainly due to varicose hemorrhoidal veins, poor diet and defecation habits, long-term diarrhea, etc., often showing blood in the stool, prolapse of hemorrhoids, perianal itching, etc., which may lead to the emergence of pulling the blood of the situation of bright red and painless. 2. Rectal polyps: mainly due to inflammatory stimulation, heredity, genetic mutation, etc., which can easily lead to the emergence of pulling blood bright red without pain. 3. Rectal tumor: the surface of rectal tumor is easy to be damaged, which often shows the symptoms of blood in stool, mucus, pus and blood in stool, which may lead to the situation of pulling blood bright red without pain. 4. Coagulation disorders: abnormal coagulation function, such as hemophilia, primary or allergic thrombocytopenic purpura, etc., mainly due to heredity, blood vessel wall abnormality, coagulation factor deficiency, platelet abnormality, etc., which may lead to the situation of bright red blood in stool without pain when the mucosa of anal canal is damaged. In addition, the colon lesions if the bleeding volume and bleeding speed, will also appear to pull blood bright red without pain performance. Therefore, it is necessary to pay attention to such symptoms and go to the hospital in time to get a clear diagnosis and then be treated accordingly.