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Doctor insights on: Black Stool Melena

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Can GI bleed turn only half the stool black... When melena enters toilet water does it turn the water red or black...Can melena be solid?

Can GI bleed turn only half the stool black... When melena enters toilet water does it turn the water red or black...Can melena be solid?

Yea: Melena can be intermittent. It does not tend to change the color of the water. It can be associated with constipation known as (tarry stool). Diarrhea occurs usually if there is an active acute bleeding, which is usually bright red. ...Read more

Dr. Michael Gabor
352 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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I have hemorrhoids and i've been lately taking PROCTOLAR(PROCTOHEAL), when i went to the bathroom i saw some black stools im worried it's melena.

I have hemorrhoids and i've been lately taking PROCTOLAR(PROCTOHEAL), when i went to the bathroom i saw some black stools im worried it's melena.

Possible: Hemorrhoids do bleed but if it is a dark, black tarry stool then the bleeding could be occurring higher up. Talk to your parents. See your doctor or gastroenterologist for a scope and they can figure out where you are possibly bleeding from. Good luck ...Read more

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Ate 900ml of dark chocolate ice cream during the evening. Next day, stool was very, very dark. Almost black. Would this cause this or melena? Nervous.

Ate 900ml of dark chocolate ice cream during the evening. Next day, stool was very, very dark. Almost black. Would this cause this or melena? Nervous.

Not melena: Hi I wouldn't worry too much about it. Melena is a recurring issue and due to small amounts of bleeding in the GI tract, not just a one time deal. It is caused by the oxidation of the iron (which is present in our blood cells) by our digestive enzymes. Sometimes there is food coloring in ice cream, which can definitely color your stool. Just keep an eye on it for now. ...Read more

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I took 40mg Iron yesterday, and ate blueberries.My stool is black, but no bad odor at all. Melena or non-melena? Thank u

Black stool: Since only a small percentage of oral iron is absorbed, black stool is commonly seen in people taking iron. A simple test is to smudge a specimen of stool on a hemoccult card and drop a few drops of testing solution on it. This can be at a lab or physicians office. ...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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Can your stool contain partial melena? This AM, stool was primarily light brown, but few pieces were very, very dark brown. What distinguishes melena?

Can your stool contain partial melena? This AM, stool was primarily light brown, but few pieces were very, very dark brown. What distinguishes melena?

No: Melina is blood in the stool. It is determined by a test on the stool. Since the stool all goes through the same tube it would be positive through a sample. ...Read more

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Very dark stool (probably melena) and oversensitive bladder (frequent urge) for more than a week now.

Very dark stool (probably melena) and oversensitive bladder (frequent urge) for more than a week now.

Not an issue for : This forum. Bleeding in the gastro-intestinal tract is a serious issue and needs to be investigated by a doctor, preferable an gastro-enterologist. ...Read more

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Are two different colored stools (yellowish and dark brown) normal?If bleeding is suspected, can there be partial melena and partial normal stool?

Are two different colored stools (yellowish and dark brown) normal?If bleeding is suspected, can there be partial melena and partial normal stool?

Sure...: Melena, by definition, is passage of dark stools stained with denatured blood. As we established in prior healthtap answers, all dark stool is not melena. Your doctor, or even an over-the-counter test that you can purchase, can check to see if your dark stool contains blood. Needed is for you to provide a sample of the dark stool. False positive results can occur based on diet &stool additives. ...Read more

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Could it be something bad if I have black stools?

Could it be something bad if I have black stools?

Possibly: Black stools can indicate bleeding from the gastrointestinal (GI) tract. It may represent blood that has been digested, turning the stool into a characteristic black, tarry stool. This may be from a stomach or duodenal ulcer. Medications can also turn the stool black, such as iron supplements and pepto-bismol. Should see your doctor. ...Read more

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Might eating oreos cause you to have black stools?

Might eating oreos cause you to have black stools?

No: If you have black, tarry malodorous stool please seek prompt medical attention for possible GI bleeding. ...Read more

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I have had black stools for the passed 8 weeks, what could be wrong?

I have had black stools for the passed 8 weeks, what could be wrong?

Possible melena: It could be a reaction to medication. However, if it is black, sticky and foul smelling it could be due to gastrointestinal bleeding. That requires prompt medical eval. ...Read more

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Is occassional black stool common?

Is occassional black stool common?

Black=blood.: While very few dietary ingredients and supplements can cause black stool, the finding of black stool should not be considered common, and could suggest bleeding from an upper gastrointestinal source. If it's common, then it should be investigated. Could be gastritis or an ulcer, for example. ...Read more

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What should I do if I have black stool?

What should I do if I have black stool?

Black stool: Take no blood thinner, plavix, (clopidogrel) Aspirin and see your docotr asap to rule out bleeding. Did you eat beets? ...Read more

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What is the reason for having black stools?

What is the reason for having black stools?

Possibly 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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Black stool, is it really black or just dark?

Black stool, is it really black or just dark?

Melena = black: When concerned about melena from GI blood loss, the stool is tarry black. If concerned ask your doctor to check your stool for blood. ...Read more

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Gi contrast cause dark black stool?

Please talk to your: Dr. I don't believe that barium contains bismuth or iron which could cause stool to become black. If the bowel movements are black., sticky & malodorous - this could be due to a GI bleed & would require prompt medical evaluation. Take care. ...Read more

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Is black stool after colonoscopy normal?

Is black stool after colonoscopy normal?

Probably not, but...: Melena is dark stools stained with denatured blood, but all dark stool is not melena. False positive hemoccult results can occur based on diet ; stool additives. However, colonoscopy can result in bleeding due to biopsies, scope abrasion/trauma, post-polypectomy oozing, etc. By all means, call your colonoscopist now ; alert them to your concern--they know your risks ; will be eager to assist you.. ...Read more

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Black stools and green urine. Is this serious?

Could be: Neither is normal. Black stools can be due to pepto bismol (bismuth subsalicylate) use or from blood arising from a source in your stomach. Green urine could be the result of some food coloring agents or medications/vitamins you are taking. Either way they should be investigated for underlying causes. ...Read more

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I have had heavy bladder n black stool for a week?

I have had heavy bladder n black stool for a week?

GI BLEED: I'm not sure what you mean by "heavy bladder, " but black stool can be a sign of bleeding from higher up in the GI tract, such as stomach, small bowel, or proximal colon. Some medicinal products, such as iron supplements or pepto-bismol can darken the stools as well. You need to make an appointment with your medical doctor. Good luck. ...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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I have had black stool and heavy bladder for a week?

See a doctor: A black stool is often a sign of blood in the stool and is not normal. It can also be seen in people who take iron supplements. If you are not taking iron supplements, you should really see a doctor and get checked out. Do not wait; see a doctor this week. ...Read more

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Black stool with orange cloud. What could this mean?

Black stool : Regardless of what color cloud is needs workup. Most commonly its related to an upper GI bleed. You will need a full history to assess other symptoms and then workup. Please see a GI doctor. ...Read more

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Black stools and bad taste? Is it because of smoking?

Black stools and bad taste? Is it because of smoking?

Black Stool: Are you taking iron supplements or meds with bismuth? If it is black, tarry and has a foul odor then this could be melena (gi bleed). That would require prompt medical evaluation. ...Read more

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I have black stool, should I go to doctors, what to do?

Stool can become: Black if one is taking iron or medications containing bismuth. Gi bleeding (melena) can cause black, tarry and malodorous stools. A stool guiac can determine if there is blood in stool. I would get it checked. ...Read more

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Is a colonoscopy necessary when someone has black stool?

Black Stool: Pepto Bismol (bismuth subsalicylate) causes your stool to be black. It really depends on your history of what is going on. If someone does have black stool and they did not just take pepto bismol (bismuth subsalicylate) for instance, they should see their doctor for a consultation to determine what is appropriate to do next. ...Read more

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Dr. John Chiu Dr. Chiu
3 doctors agreed:
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Is tarred, black stools what happens with celiac disease?

Dr. John Chiu Dr. Chiu
3 doctors agreed:

Unusual: This often means bleeding in the intestines. See a doctor immediately. ...Read more

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Black stools after drinking. Is this a common side effect?

Black stools after drinking. Is this a common side effect?

Black stools: After drinking is an ominous sign for a gastric ulcer or gastritis, aggravated by the alcohol, leading to bleeding. The blood turns black when exposed to acid in the stomach and hence makes the stools black. Stop drinking! and go see a gastroenterologist to make the diagnosis and get you on a treatment plan before you do some serious damage. ...Read more

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Is it normal having black stools after drinking hard alcohol?

Is it normal having black stools after drinking hard alcohol?

NO: Alcohol can cause gastritis or other kinds of GI bleeding. Stools could be black because of passing old blood. Please see your family physician for evaluation and help. This will only get worse with inattention and continued alcohol use. ...Read more

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2yr old started w/ hard lil balls now black stool but no pain?

2yr old started w/ hard lil balls now black stool but no pain?

No other disease?: Each child with constipation needs to be sure there is no other disease causing it. A pediatrician's evaluation is needed. We do not want a child to get chronic constipation. If constipation is due to slow movement of food and poop through the gut, then things to try are vegetables, water, prune juice, prunes, fiber-plus-water, Miralax (polyethylene glycol), senna extract, milk of magnesia, etc... ...Read more

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Is black stool always blood, or could some foods or drinks cause it?

Is black stool always blood, or could some foods or drinks cause it?

Iron, petobismol: It is reasonable to see a doctor who can check the stool for blood, or give you special cards to collect the stool for a test. ...Read more

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What exactly does having black stool signify and what can be done to remedy it?

What exactly does having black stool signify and what can be done to remedy it?

See your doctor: Black tarry stools are an indication of bleeding in the GI tract. Taking iron may impart a black color to the stools. If you have any doubt see your doctor for a proper evaluation to rule out GI bleeding. ...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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What do you advise if i had one brown stool, and one half brown and black stool a few minutes ago.?

What do you advise if i had one brown stool, and one half brown and black stool a few minutes ago.?

Nothing: stool color will vary depending on food intake. Be concerned if multiple stools have blood or are black like tar. If either occur repeatedly you need to report this to your doctor. ...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?

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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Black stool with regular stool mixed, was regular up until this morning , could it be something i ate, it's solid not irregular?

Black stool with regular stool mixed, was regular up until this morning , could it be something i ate, it's solid not irregular?

Need for examination: Black tarry stool is generally a result of bleeding in the gastro-intestinal tract. You should see your doctor to rule out GI bleeding. ...Read more

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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?

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

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


Feces (Definition)

Feces is the product of ...Read more