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The presence of bright red blood in stool, known as hematochezia, typically indicates lower gastrointestinal bleeding. Digested blood from the upper gastrointestinal tract may appear black rather than red, resulting in "coffee ground" vomit or melena. [2] Other signs and symptoms include feeling tired, dizziness, and pale skin color. [18]
Blood in stool looks different depending on how early it enters the digestive tract—and thus how much digestive action it has been exposed to—and how much there is. The term can refer either to melena, with a black appearance, typically originating from upper gastrointestinal bleeding; or to hematochezia, with a red color, typically originating from lower gastrointestinal bleeding. [6]
Hematochezia is a form of blood in stool, in which fresh blood passes through the anus while defecating. It differs from melena, which commonly refers to blood in stool originating from upper gastrointestinal bleeding (UGIB). [ 1] The term derives from Greek αἷμα ("blood") and χέζειν ("to defaecate"). Hematochezia is commonly ...
The two most common causes of bright red blood in your stool are anal fissures and internal hemorrhoids, he says. “If red blood drops into the toilet from your bottom or you find it on your ...
When you have hemorrhoidal bleeding, the blood will be bright red, since hemorrhoids are at the end of the anal canal. “The bleeding in and of itself is just a very small fraction of the puzzle.”
Bright red stool, called hematochezia, is the sign of a fast moving active GI bleed. [1] The bright red or maroon color is due to the short time taken from the site of the bleed and the exiting at the anus. The presence of hematochezia is six-times greater in a LGIB than with a UGIB. [5]
Those with rectal bleeding may notice bright red blood in their stool. Symptoms associated with rectal bleeding include having several bowel movements in a day, feelings of incomplete rectal evacuation, straining, hard or lumpy stools, feelings of urgency, loose or watery stools, and leakage of bowel movement.
Fecal occult blood testing (FOBT), as its name implies, aims to detect subtle blood loss in the gastrointestinal tract, anywhere from the mouth to the colon.Positive tests ("positive stool") may result from either upper gastrointestinal bleeding or lower gastrointestinal bleeding and warrant further investigation for peptic ulcers or a malignancy (such as colorectal cancer or gastric cancer).
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