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A 27-year-old member asked:

What can cause my stool to be black and stinky?

1 doctor answer2 doctors weighed in
Dr. Arthur Heller
Gastroenterology 44 years experience
Bleed. Call MD NOW: Black, tarry stools can be seen with bleeding in the gut- usually upper GI tract (stomach, duodenum), but not always; even without pain, nausea, etc. Risks include aspirin, nsaids, alcohol, ulcer history, steroids. Black stools also from pepto-bismol, iron pills, arsenic (not prescribed anymore), charcoal. Black is black, dark is dark. Call doc now. If lightheaded, chest discomfort, palps: er now.

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A 30-year-old member asked:

What are some causes that would turn my stool black?

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
Melena?: Medications with bismuth like pepto bismal. Black, tarry, malodorous stool can be due to GI bleeding and should be promptly evaluated.
San Rafael, CA
A 57-year-old female asked:

What is are causes of black, grainy stool?

1 doctor answer1 doctor weighed in
Dr. Gina Cadena-forney
Family Medicine 22 years experience
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 discuss having an endoscopy.
A 32-year-old member asked:

What can cause black streaks in stool?

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
Possibly: Due to blood, iron, bismuth meds or certain foods.
A 34-year-old member asked:

What is the cause of black slimy stool?

1 doctor answer3 doctors weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
Get eval: Some causes of stool being black include taking medications that contain bismuth or eating foods or supplements that contain iron. Stool that is black, tarry and smells bad can be melena. Melena is due to GI bleeding. Recommend prompt medical evaluation.
Hampton, GA
A 52-year-old female asked:

What causes stool to be black?

2 doctor answers6 doctors weighed in
Dr. Heidi Fowler
Psychiatry 26 years experience
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 that is the case - it should be promptly medically evaluated. Take care.

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