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Doctor insights on: Black Stool Causes

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Yesterday I had soft, VERY green stool. Today, I had a very hard, very dark green, almost black stool. Is this cause for concern?

Yesterday I had soft, VERY green stool. Today, I had a very hard, very dark green, almost black stool. Is this cause for concern?

No: You may take a fiber laxative like Metamucil and drink enough water daily so that your urine is colorless. For the long term you may try to increase your intake of fiber foods. Consult this site for fiber foods. http://www.mayoclinic.org/healthy-lifestyle/nutrition-and-healthy-eating/in-depth/high-fiber-foods/art-20050948 Get HPV vaccine Practice safe sex ...Read more

Dr. Zahid Niazi
319 doctors shared insights

Melena (Definition)

Melina is blood in the stool that is black, tarry, sticky, and smelly. The blood in melena comes from high up in the gastrointestinal tract, and gets partially digested which is why it changes to melena. Bright red blood comes from lower ...Read more


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What causes black stools?

What causes black stools?

Blood: Black stools or melena, is always considered blood. It usually comes from the stomach or the beginning parts [higher up in our jargon] of the small intestine. Bleeding from colon usually comes out red. Black or red stools need to be investigated. ...Read more

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What causes black stool?

What causes black stool?

Sometimes it is: caused by things like iron supplementation or Peptobismal. If there is black, tarry malodorous stool it could be GI bleeding and should prompt medical evaluation. Take care. ...Read more

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Can iron in women cause black stools?

Can iron in women cause black stools?

Melena ?: 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 md visit. ...Read more

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What would cause black stools in a 14 month old?

What would cause black stools in a 14 month old?

Possible blood: Black stools could be from a number of things, but it is very important to make sure it is not caused by an intestinal bleeding high in the gut. You need to take the baby and the black stool to the doctor so he/she can test the stool for blood. ...Read more

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Cholecystomy two weeks ago. What causes black stool? Should i be concerned?

Cholecystomy two weeks ago. What causes black stool? Should i be concerned?

Blood: You should speak with the surgeon that did your case. Blood from above usually is the source of black stool. Given that you are two weeks out from your procedure, you should definitely let your surgeon know about this. ...Read more

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What foods can cause black stool (i have gastritis)?

Contact doc now: While some foods are produce a black stool, this is often a sign that you are bleeding from the stomach or intestine. See your doctor immediately for testing. ...Read more

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Can manchurian gravy cause black stools? Bit of nauseous, stomaxh upset and anxiety

No: This is a Chinese dish served over meatballs containing onions, chili, garlic and pepper. If you made it spicy, it may have exacerbated an ulcer or hemorrhagic gastritis from another cause. If the black stools continue or you become light-headed or clearly sick, get with your physician. ...Read more

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Can antibiotics cause black stool?

Not likely: If you have tarry black stool, see your doctor asap, as it is an indication of bleeding in the intestine. ...Read more

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Can an antibiotic cause black stool?

I don't specifically: Know of one that causes black stool. If stool is black, tarry and malodorous that could be melena (gi bleed). That would require prompt medical evaluation. ...Read more

Dr. Irina Medwin
115 doctors shared insights

Black Tar Colored Stools (Definition)

Black stool is a symptom in which a person's stool (poop) has a black color, or sometimes a very dark red color. Black stools are usually due to old blood (fresh bleeding is red in color). ...Read more


Stool Is Black (Definition)

Stool is black is a symptom in which there is black, reddish-black, or very dark coloring to stools. Black stools can be due to old blood in the stools ...Read more