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Eating beetroot can cause harmless red-colored feces because of insufficient metabolism of a red pigment, and is a differential sign that may be mistaken as hematochezia. Consumption of dragon fruit or blackberries may also cause red or black discoloration of the stool and sometimes the urine (pseudohematuria). This too, is a differential sign ...
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]
This creates the classically described "red currant jelly" stool, which is a mixture of sloughed mucosa, blood, and mucus. [7] A study reported that in actuality, only a minority of children with intussusception had stools that could be described as "red currant jelly", and hence intussusception should be considered in the differential ...
Internal hemorrhoids usually present with painless, bright red rectal bleeding during or following a bowel movement. [8] The blood typically covers the stool (a condition known as hematochezia), is on the toilet paper, or drips into the toilet bowl. [8] The stool itself is usually normally coloured. [8]
A lower gastrointestinal bleed is defined as bleeding originating distal to the ileocecal valve, which includes the colon, rectum, and anus. [2] LGIB was previously defined as any bleed that occurs distal to the ligament of Treitz, which included the aforementioned parts of the intestine and also included the last 1/4 of the duodenum and the entire area of the jejunum and ileum. [1]
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When bright red blood is vomited, it is termed hematemesis. Hematemesis, in contrast to coffee ground vomitus, suggests that upper gastrointestinal bleeding is more acute or more severe, for example due to a Mallory–Weiss tear, gastric ulcer or Dieulafoy's lesion, or esophageal varices. This condition may be a medical emergency and urgent ...