Pulling blood bright red without pain, indicating that the bleeding site in the anus above the dentate line, and the site is close to the anus, generally for the rectum bleeding. Common diseases are mainly internal hemorrhoids, rectal tumors, rectal polyps and other reasons. It is recommended to go to the hospital colorectal and anal surgery outpatient clinic or anorectal surgery outpatient clinic, a clear diagnosis, under the guidance of the doctor’s treatment. 1. Internal hemorrhoids: when patients defecate with excessive force, the hemorrhoidal vein varicose aggravates, and feces easily scratches the surface mucosa of hemorrhoidal nuclei, resulting in bleeding, generally hemorrhoids caused by bleeding is bright red in color, and the form of dripping or jetting. 2. Rectal tumor: the tumor location is relatively low, in the middle and lower rectum, there will be painless stool with blood, or pus and blood stool, and the blood is bright red. 3. Rectal polyp: when the patient has a large polyp in the rectum, the friction between the polyp and the rectal mucosa can lead to rupture of the mucosal blood vessels and bleeding, which is manifested as painless bloody stool. 4. Other: if the coagulation dysfunction disease, such as hemophilia, various thrombocytopenic purpura, etc., if there is constipation, stool can lead to rectal mucosal tear and bleeding; in addition, the colon, especially the sigmoid colon period of time a lot of bleeding, can also lead to painless bright red blood stool.