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Doctor insights on: Bloody Or Black Stool

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Dr. Sandra Lora Cremers
312 doctors shared insights

Melena (Definition)

Melena is also known as Black stool. 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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Do all rectal/colon cancer have bloody or black stool?

Do all rectal/colon cancer have bloody or black stool?

No. Microscopic poss: Not all colon cancers cause changes to stool that u can see w/ your eye. Some polyps (pre-cancerous lesions) cause MICROscopic blood in the stool that only sensitive lab tests can pick up. Bright red stool is thought 2 b from rectum, maroon red stool from intestine, & dark / black stool (melena) from stomach; however, it depends on how brisk bleeding is. Slow bleeds may not discolor stool at all. ...Read more

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I am so confused about how bloody tarry stool looks like...compared to black stool. Aren't they the same thing?

I am so confused about how bloody tarry stool looks like...compared to black stool.  Aren't they the same thing?

Be cautious: If you have black stools and are not sure if these are tarry black, treat it as if it were black tarry stool and get a sample tested for blood. ...Read more

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Chronic constipation.Bloody stools..Dr said its anal fissure nd take care of constipation.Have occasional black stool too.Feel heavines in anal regon?

Chronic constipation.Bloody stools..Dr said its anal fissure nd take care of constipation.Have occasional black stool too.Feel heavines in anal regon?

See answer: It's true that constipation is most common cause of anal fissure, and also hemorrhoids, which are usually associated with painful bm, bright red blood on tissue paper or in toilet bowl, and "heaviness" in anorectal region. My concern is the chronicity of your constipation and, if you are not taking iron, black stools may imply bleeding from a source in upper GI tract. Recommend gastroenterologist. ...Read more

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What to do if I had a bloody stool two times in 10 minutes and days after What to do if I had a black stool.i have this nervous feeling in abdomen. anus is sticking out?

What to do if I had a bloody stool two times in 10 minutes and days after What to do if I had a black stool.i have this nervous feeling in abdomen. anus is sticking out?

How long waiting?: I sincerely hope you have seen a doctor since your posting. This sounds serious and you need to be evaluated by your PCP, GI doctor, or if you are really losing blood, go to the ER if for some reason you can't reach your PCP for advice. Do not accept a wait time of weeks to be seen. ...Read more

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Anything besides melena cause maroon-to-black goop & dark bms? Two gis agree my pain etc is IBS and that bloody stools in past were hemorrhoids, but this week doc said i don't have hems anymore?

Likely melena: What you describe definitely sounds like melena. If so that means the blood is coming from the upper GI tract. That can be serious and should not be ignored. A stool test for blood will easily tell you the answer, and a complete blood count will give a good indication of how much blood has been lost. Get in to see a doctor as soon as you can. ...Read more

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How much should I worry about black stools?

Check for bleeding: If your stools are black, tarry (sticky) and have a bad odor - this could be gastrointestinal bleeding and should be checked out promptly. As stated in a previous answer, some medications can cause black stools. It is simple to test the stool to determine if it contains blood. ...Read more

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What does it mean if you have black stools?

What does it mean if you have  black stools?

Dark-colored stool: 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. Silver-colored stool suggests bleeding from the biliary tree. Get checked. ...Read more

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Had black stools today should I be worried?

Likely not: Wouldn't worry about one episode, may be dietary related. If however they persist and you have other symptoms (abdominal pain, dizziness) need evaluation to be sure you do not have gastrointestinal bleeding. ...Read more

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Stool Is Black (Definition)

Stool is black is also known as Black stool. 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


Dr. Irina Medwin
115 doctors shared insights

Black Stool (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 ...Read more