Rectal bleeding

woman with abdominal pain
Our Blood in the Stool (Rectal Bleeding) Main Article provides a comprehensive look at the who, what, when and how of Blood in the Stool (Rectal Bleeding)

Medical Definition of Rectal bleeding

Rectal bleeding: Blood passed rectally. Blood in the stool can be bright red or maroon in color. Larger amounts of blood that remain in the intestine long enough can turn the stool black. Blood in the stool also may be invisible to the naked eye (occult).

The causes of blood in the stool range from harmless, annoying conditions of the gastrointestinal tract such as hemorrhoids to very serious conditions such as cancer. Blood in the stool should be evaluated by a healthcare professional.

See: Anal fissure; Colon cancer; Crohn's disease; Diverticulosis; Peptic ulcer; and Gastric cancer.

Picture of Colon Anatomy and Sources of Rectal Bleeding


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Reviewed on 5/13/2016

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