A female asked:
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what causes black grit in stools ?

1 doctor answer
Dr. Charles Cattano
38 years experience Gastroenterology
Seeds, blood...: Dark-colored stools may result from iron supplements, foods you eat (like a lot of spinach), substances (like peptobismol), but most significantly suggests bleeding. When blood is denatured by acid in your stomach, as from ulcers, stools will turn tarry ("melena"). Blood may also be ingested from nose bleeds, bleeding gums... Persistent melena (without obvious cause) & symptoms warrants doc visit.
Answered on Aug 7, 2020

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Dr. Heidi Fowler
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Black Stool: can be related to taking medications (like pepto bismal). If the stool is black, stinky and sticky - it may be due to rectal bleeding (melena). If tha ... Read More
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Possibly: Due to blood, iron, bismuth meds or certain foods.
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Upper bleed: Black stool is usually the result of an upper digestive bleeding. Blood turn black after traveling the digestive tract. You should see your doctor and ... Read More
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