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What Causes Black Discolouration In Stool?

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Posted on Fri, 15 Jul 2016
Question: WHAT I WANTED TO KNOW, IS THERE ANY MEDICAL COMPLICATION ASSOCIATED WITH BLACK STOOL ????
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Answered by Dr. Panagiotis Zografakis (50 minutes later)
Brief Answer:
gastrointestinal bleeding...

Detailed Answer:
Hello,

upper gastrointestinal bleeding causes black stool. More than 30mL of blood are required for the stool to turn black. The bleeding usually originates on the stomach or duodenum. Black stool requires urgent investigation for the cause and prompt treatment.

Kind Regards!
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Above answer was peer-reviewed by : Dr. Chakravarthy Mazumdar
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Answered by
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Dr. Panagiotis Zografakis

Internal Medicine Specialist

Practicing since :1999

Answered : 3810 Questions

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What Causes Black Discolouration In Stool?

Brief Answer: gastrointestinal bleeding... Detailed Answer: Hello, upper gastrointestinal bleeding causes black stool. More than 30mL of blood are required for the stool to turn black. The bleeding usually originates on the stomach or duodenum. Black stool requires urgent investigation for the cause and prompt treatment. Kind Regards!