upper gastrointestinal bleeding pathophysiology

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What are signs of upper gastrointestinal bleeding?

Black, tarry stools

Reflux
Bleeding in the gastrointestinal (GI, gut) tract can be unnoticed if low amounts and intermittent. Lower GI bleeds can result in bright red blood per rectum (BRBPR) or maroon stools. Bleeding in the upper GI tract passes through the bowels and gets transformed to a black tarry, or sometimes called "coffee grounds" look. A simple test for blood is the fecal (stool) occult blood test.
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Does ulcer cause most of upper gastrointestinal bleeding?

MANY CAUSES

Upper GI bleed can be from esophagitis, esophageal varices, esophageal tears, cancer, polyps, gastritis, errosions and ulcers.
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What are the symptoms of upper gastrointestinal bleeding?

Melena

149353790
or black tarry stools usually. Also, blood is a cathartic which means you may have very loose stools. If the bleeding persists you can become anemic and symptoms of that are lightheadedness, pale skin and pale conjunctivae in your eyes.
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Why gastrointestinal bleeding?

Many

Gastrointestinal
Varices, ulcers, vascular abnormalities, cancers, polyps, diverticulosis, IBD or hemorrhoids to name a few.
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What are symptoms of gastrointestinal bleeding?

MANY

Bleeding
There is no specific symptom but here are some: bleeding, fatigue, weakness, shortness of breath, dizziness, chest pain, vomiting blood, blood per rectum, black stools to name a few.
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Dr. Joel Gallant answered:

Will cirrhosis cause gastrointestinal bleeding?

It can

Endoscopy
It can. You can bleed from varices: dilated blood vessels in the esophagus. People with cirrhosis can also bleed from the usual causes, such as gastritis and ulcers, especially if they're drinking. It's generally recommended that people with cirrhosis get an upper endoscopy to find out whether they have varices, since there are things that can be done to prevent them from bleeding.
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What are possible causes of gastrointestinal bleeding?

MANY

Bleeding
There are many causes for a gastrointestinal bleed. To name a few: ulcers, varices, cancer, medications, arterial venous malformations, polyps and hemorrhoids. The best thing is to see a gastroenterologist who can perform and upper endoscopy and/or colonoscopy to find the cause and provide the best treatment.
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If left untreated, will gastrointestinal bleeding harm you?

Depends

Hand_ulcer
This strongly depends on the cause of the bleeding. Any undiagnosed GI bleeding warrants further evaluation. There are several potentially minor and self limited causes for bleeding, but there are also some very concerning or dangerous causes like cancers or ulcers. If you don't have a diagnosis for bleeding, then see your doctor.
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What are the symptoms of gastrointestinal bleeding in a male?

Black or bloody

Scurvy
stools, If you have black, really foul smelling stools then it's usually an upper GI bleed and if there is frank blood in the stool then it's likely a lower GI bleed. Also, blood is a cathartic which means you may have very loose stools as well.
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What if have dark bowel color --is it gastrointestinal bleeding?

Maybe

Blood
Digested blood from the upper GI tract is usually black, marroon and or tarry/loose in consistency. If you think you may be having GI blood loss you should always see your doctor for evaluation. There are simple tests which can be done on stool to evaluate for the presence of blood. Anytime you have copious amounts of black tarry stool or bright blood in stool seek immediate evaluation.
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