Re: Blood in stool

Internal hemorrhoids

With internal hemorrhoids, you may see bright red streaks of blood on toilet paper or bright red blood in the toilet bowl after you have a normal bowel movement. You may see blood on the surface of the stool.

Internal hemorrhoids often are small, swollen veins in the wall of the anal canal. But they can be large, sagging veins that bulge out of the anus all the time. They can be painful if they bulge out and are squeezed by the anal muscles. They may be very painful if the blood supply to the hemorrhoid is cut off. If hemorrhoids bulge out, you also may see mucus on the toilet paper or stool.


http://www.webmd.com/a-to-z-guides/hemorrhoids-topic-overview