occur anywhere in the digestive tract. The blood is digested as it moves
through the digestive tract. The longer it takes the blood to move through the
digestive tract, the less it will look like blood. Often blood that is caused
by bleeding in the stomach will look black and
tarry. A tarry stool has a black, shiny, sticky appearance and looks like
tar on a road. Blood that has moved quickly through the
digestive tract or that begins near the rectum may appear red or dark red.
Certain medicines and foods can affect the color of the stool. Diarrhea medicines (such as Pepto-Bismol) and iron tablets can make the stool black. Eating lots of beets may turn the stool red. Eating foods with black or dark blue food coloring can turn the stool black.