As the stool slowly moves through the small and large intestines, any collected blood has time to coagulate and darken. Melena is the term used to describe black, tarry stools. Brighter, redder stools suggest that the bleeding is at the lower end of the gastrointestinal tract as the blood is fresh.
Bright red blood usually means bleeding that’s low in your colon or rectum. Dark red or maroon blood can mean that you have bleeding higher in the colon or in the small bowel. Melena (dark and tar-like stool) often points to bleeding in the stomach, such as bleeding from ulcers.
Blood in stool can take many forms: pooping blood, bright red blood in stool, bloody diarrhea, bloody mucus in stool. There can be several causes of blood in stool. Find out which ones aren't cause for concern and which ones mean it's time to see a doctor.
Bright red blood in stool means the bleeding originated lower in the intestinal tract, past the intestines. Hemorrhoids, constipation, anal fissures, angiodysplasia, and bowel disorders can cause bright red blood. Dark red or black blood means the bleed happens further up and is generally considered more problematic. Blood from the upper GI ...
The blood may occur as red color in the stool (melena), in which case, it is mostly indicative of an infection of the intestine. But if the stool appears black, then it means that the infection is of the upper gastrointestinal tract, as the hemoglobin in the blood has turned black due to oxidation, which can only occur when the blood originates ...
Overview. Seeing blood on toilet paper can be a little alarming. You may have heard that rectal bleeding is a sign of cancer, but more often, bleeding is a symptom of a less serious cause. Many ...
Overview. The fecal occult blood test (FOBT) is a lab test used to check stool samples for hidden (occult) blood. Occult blood in the stool may indicate colon cancer or polyps in the colon or rectum — though not all cancers or polyps bleed.
Blood in the Stool after Drinking: Potential Abdominal Bleeding One of the first distinctions that a physician needs to make when dealing with patients suffering from blood in the stool after drinking is describing the color and the quantity of blood that has been lost. When patients present with very dark stools that almost look like coal, it is more likely that patients are suffering from ...
What Does a Positive Fecal Occult Blood Test Mean? Frederick R. Jelovsek MD. When the doctor does a rectal exam and smears a stool sample on a card to test for blood in the stool, or gives you a paper to drop into the toilet to look for a color change, this is known as testing for occult gastrointestinal bleeding.
Blood in the stool may be less evident, and is sometimes invisible, or causes a black or tarry stool. People commonly attribute all rectal bleeding to hemorrhoids, thus preventing early diagnosis owing to lack of concern over "bleeding hemorrhoids." Blood usually, but not always, can be detected through a fecal occult (hidden) blood test, in ...