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Bright red blood in your stool usually means the bleeding is lower in your colon, rectum or anus. Dark red or maroon blood can mean that you have bleeding higher up in your colon or your small intestine. Melena (black stool) often points to bleeding in your stomach, such as a bleeding stomach ulcer.
Common causes of rectal bleeding include: Anal fissure (a small tear in the lining of the anal canal) Constipation — which can be chronic and last for weeks or longer.
The most apparent sign of rectal bleeding is red blood on toilet tissue or visible blood or red-tinged stool in the toilet bowl.
“Bright red blood might be something low in the colon or rectum like diverticular bleeding or hemorrhoids, darker blood may be from higher up in the colon,” says Richards. “If the blood is more black or tar-like, that might signal an issue in the small intestine or stomach.”
Bright red blood originates from your lower GI tract — think lower colon, rectum or anus. Dark red or maroon blood originates higher up — think upper colon or somewhere in your small intestine. Dark, tar-colored blood could originate as far up as your esophagus. Common causes of rectal bleeding. Hemorrhoids.
Bright red blood in your stool is a sign of bleeding in the lower digestive tract. It is most likely caused by a condition like hemorrhoids or diverticular disease. However, bloody stool can be a symptom of serious conditions that need to be ruled out, including colon cancer. The colon, rectum, and anus are lined with blood vessels.
If you notice bright, red blood right after a bowel movement, you may have rectal bleeding. A bleeding rectum can be commonly caused by anal fissures, hemorrhoids, or chronic constipation.