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what causes black stools in bowel movements

by Brody Murray Published 3 years ago Updated 2 years ago

Causes of black stool include iron pills or bismuth-containing medications (such as, bismuth subsalicylate or Pepto-Bismol). If the stool color is dark because of any of these medications, it is typically not sticky in texture and is not foul-smelling.

Most cases of black stools are from eating black foods or iron supplements. Stool that is black due to blood indicates a problem in the upper GI tract. Blood in the stool can be detected through a stool test. See your healthcare provider right away if you have black stool along with pain, vomiting, or diarrhea.Oct 31, 2021

Full Answer

What foods cause black stools?

What foods cause dark stools? Dark stool may be caused by foods or medications including: Beets. Black licorice. Blueberries. Iron supplements. Medications containing bismuth subsalicylate (for example, Kaopectate or Pepto-Bismol) Can stress cause black stool? Damage to your stomach lining can happen for a variety of reasons, including stress ...

Which foods can cause dark stool?

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  • Junk Foods. Eating a lot of junk food results in a change int eh colour of the poop. ...
  • Blueberries. A lot of studies have shown eating lots of blueberries can darken the stool. ...
  • Dark Vegetables. ...
  • Caffeine. ...
  • Sugary Drinks. ...
  • Beef. ...
  • Kidney Beans. ...
  • Prunes. ...

What does black stool indicate and how is it treated?

Why Is Your Poop Black and Tarry?

  • Iron Supplements. Black poop can be a side effect of iron pills you take for anemia -- a condition that happens when you don't have enough red blood cells to ...
  • Dark-Colored Foods. Sometimes dark-colored foods turn your poop black. ...
  • Medicines With Bismuth. ...
  • Bleeding Ulcer. ...
  • Esophageal and Gastric Cancers. ...
  • Mallory-Weiss Tear. ...
  • Esophageal Varices. ...

What are black stools a sign of?

Black stool may be from dark foods and drinks (beets and dark beer), supplements like iron, or a sign of bleeding in the upper GI tract. If stool is black and has a bad odor, it is likely a sign of bleeding, from a peptic ulcer, gastritis, inflammation, colon polyps, or colon cancer.

When should you worry about black stool?

People who have had black specks in their stool for more than a day or two should see a doctor if they are not taking medication that turns the stool black. Similarly, they should see a doctor if they cannot explain the color by any foods they have recently eaten.

What does Black poop poop mean?

Black or tarry stools with a foul smell are a sign of a problem in the upper digestive tract. It most often indicates that there is bleeding in the stomach, small intestine, or right side of the colon. The term melena is used to describe this finding.

What causes you to have black poop?

Black stool may be from dark foods and drinks (beets and dark beer), supplements like iron, or a sign of bleeding in the upper GI tract. If stool is black and has a bad odor, it is likely a sign of bleeding, from a peptic ulcer, gastritis, inflammation, colon polyps, or colon cancer.

What does black poop mean in adults?

Most cases of black stools are from eating black foods or iron supplements. Stool that is black due to blood indicates a problem in the upper GI tract. Blood in the stool can be detected through a stool test. See your healthcare provider right away if you have black stool along with pain, vomiting, or diarrhea.

Can dehydration cause black stool?

Dark brown stool can be caused by dehydration, constipation, IBS, or simply from eating dark-colored foods or iron-rich foods or supplements.

How do you treat black stool?

What are the treatment options for black stools?proton pump inhibitors (PPIs), which reduce the amount of acid in your stomach so the ulcers can heal.H2 receptor antagonists, which also reduce the amount of acid in the stomach.over-the-counter antacids.reduced use of nonsteroidal anti-inflammatory drugs (NSAIDs)

What foods cause black poop?

Sometimes dark-colored foods turn your poop black. These include: Black licorice. Chocolate sandwich cookies.

What foods cause black poop?

Foods that are rich in iron can also cause black-tinged stool. This can sometimes present as flecks or specks as well. Examples of these foods include oysters and kidney beans. Taking iron supplements can also cause stool to turn black or green with black specks.

What color poop indicates a problem?

Stool Color Changes Facts Normal stool color is brown. This is due to the presence of bile in the stool. Normal stool color can range from light yellow to brown to almost black. If stool is red, maroon, black, clay-colored, pale, yellow, or green this may signify a problem.

What does black poop look like?

Black tarry stools Red blood cells are broken down by digestive enzymes in the intestine and turn the stool black. These stools tend to be tar-like (sticky) and foul-smelling. This can be a medical emergency; black tarry stools should not be ignored.

Can black stool cause death?

Overview. Gastrointestinal (GI) bleeding is a symptom of a disorder in your digestive tract. The blood often appears in stool or vomit but isn't always visible, though it may cause the stool to look black or tarry. The level of bleeding can range from mild to severe and can be life-threatening.

Why is my poop black?

If you notice your poop is black or tarry, it might be due to something as simple as a change in your diet or a new medicine you're taking. Sometimes, though, it's a sign of a medical problem that you don't want to ignore. Even if you think you know why it's happening, always call your doctor if you have black, tarry stools.

What does it mean when you have a black tarry stool?

If you have bleeding in the upper GI tract -- the esophagus, stomach, and duodenum -- you could have black, tarry stools that are called melena. It could be a sign of esophageal and gastric cancers. Treatment for these cancers depends on the stage of the disease and how far it's spread.

What is it called when your poop is dark?

An ulcer is an open sore on the inside of your stomach or small intestine. Sometimes these sores bleed. This can make your poop dark. Blood exposed to gastric acids turns black and tarry (sticky). This is called melena and is a sign of an upper gastrointestinal bleed.

What does it mean when you throw up?

Heartburn. Nausea, throwing up, or having vomit that looks like coffee grounds. Some medicines for ulcers lower the amount of acid in your stomach. Others coat and protect it from the damage that stomach acids can cause. Call your doctor if you: See blood in your poop or vomit. Have trouble breathing.

What does it mean when you vomit black stuff?

Other symptoms you might get are: Bright red vomit or black stuff in your vomit that looks black like coffee grounds. Weakness. Dizziness or fainting.

What happens if you poop black?

Other side effects of iron supplements are: Stomachache. Nausea.

How to treat cancer of the esophagus?

Treatment for these cancers depends on the stage of the disease and how far it's spread. Options can include surgery, chemotherapy, or radiation. Mallory-Weiss Tear. Intense coughing or vomiting can tear the esophagus and make it bleed, a condition called a Mallory-Weiss tear.

Why does my stool turn black?

Other causes include NSAIDs, smoking, or drinking alcohol or eating foods that irritate the lining of the stomach. Inflammation can cause small amounts of bleeding, which can turn your stool black. Treatment depends on the cause. If the gastritis is caused by smoking, stop smoking.

What is a black poop?

Black or bloody stool. Colon polyps are small growths in the colon. Polyps begin as benign (not cancerous) growths, but can develop into cancer over time. Usually, they do not have any symptoms, but sometimes, they can ooze small amounts of blood. A colonoscopy can find polyps before they become cancerous.

What does it mean when your stool is hard?

Hard, pebbly stool. Dark brown or black colored stool. Abdominal discomfort or bloating. Constipation is when you have infrequent bowel movements and stool is very hard and dry. The stool may appear darkish or black. When you try to have a bowel movement, you may strain, or your stool may look like hard pellets.

Why is my stool brown?

If your stool is any color other than brown, it may be alarming. Sometimes the reason is as innocent as eating new foods. But stool colors can also be a sign of serious conditions like gastrointestinal bleeding, so it’s important to find out what’s going on. Diarrhea & Stool. 8 Causes of Diarrhea.

Why does my baby's stool smell black?

Black blood in the stool usually also has a bad odor. In the first day of life, newborns have black stool made up of amniotic fluid, skin cells, and other things ingested while in the womb. This is normal and changes to a tan color within a few days. 1. Peptic ulcer.

What does it feel like to have a hard bowel movement?

When you try to have a bowel movement, you may strain, or your stool may look like hard pellets. You may feel abdominal pain, cramping, or bloating. Laxatives, good nutrition, and drinking a lot of fluids can all help with constipation.

What is the cause of H pylori?

If it’s caused by H pylori, you’ll be prescribed antibiotics to treat the infection. If NSAIDs are the cause, your doctor will consider lowering or changing what you are taking.

Why is my stool black?

If a person’s stool is black, the likeliest reasons are that they have eaten certain foods or that there is bleeding in their gastrointestinal tract. For a person who has no other symptoms and who suspects that foods are to blame, there should be no cause for concern.

What can make your stool black?

If a person has blood in their stool or any other symptoms of bleeding, they should speak to a doctor immediately. A variety of foods and medications can make a person’s stool black. These can include: blueberries. black licorice. blood sa usage. iron tablets.

What is angiodysplasia in stool?

Trusted Source. describe angiodysplasia as abnormal groups of vessels in the mucous membrane of a person’s gastrointestinal tract. It is not clear why angiodysplasia happens, but it can cause bleeding and blood in a person’s stool, which can make it black and tarry.

What causes black tarry stool?

Benign tumors and cancer. According to NIDDK, benign tumors or cancerous formations in the esophagus, stomach, colon, or rectum can cause blood in a person’s stool, which may make it black and tarry. A benign tumor is a tumor that is not cancerous. Whether they are benign or cancerous, tumors can weaken the gastrointestinal wall ...

Why do I have reflux?

The key causes are complications from certain medications, smoking, or increased pressure in the abdomen. This pressure can result, for example, from being overweight or pregnant.

What is the best medicine for black stool?

blood sausage. iron tablets. the indigestion medication bismuth subsalicylate (Pepto-Bismol) If a person has recently consumed any of these and their stool is black, there is likely no cause for concern.

How to tell if you have blood in your stool?

As well as blood in a person’s stool, symptoms include: 1 dull, burning pain in the stomach 2 bloating 3 burping 4 vomiting 5 having a low appetite 6 losing weight

Why is my stool black?

Black stool can be due to a variety of serious or life-threatening conditions that result in bleeding of the gastrointestinal tract including: Abdominal or esophageal trauma. Abnormal blood vessel.

What are the symptoms of black stool?

Symptoms that may accompany black stool include: Abdominal pain or cramping. Abdominal swelling or bloated feeling. Change in bowel habits.

What to do if your stool is dark?

Seek prompt medical care if you have unusually dark stools or any change in the color or texture of your stool. If your stools are black and tarry in texture, bloody, or if you have major rectal bleeding, seek immediate medical care (call 911).

What causes a swollen stomach?

Bowel ischemia (lack of normal blood flow to the intestines and death of intestinal tissue) Gastritis, such as irritation and swelling of the stomach caused by nonsteroidal anti-inflammatory drugs (NSAIDs) Inflammatory bowel disease (includes Crohn’s disease and ulcerative colitis) Radiation therapy.

Can you see blood in stool?

Very small amounts of blood in the stool may be seen by the naked eye and not significantly change the color of stool. This is called fecal occult blood, which can be a symptom of a serious disease and may be found with regular, routine medical testing.

Can black stool cause anemia?

You can best reduce the risk of complications of black stool and its underlying causes by following the treatment plan you and your health care provider design specifically for you. Failure to seek prompt diagnosis and treatment for black stool can result in life-threatening complications, such as: Anemia.

Black and tarry stool symptoms explained

Not everyone talks about it, but everybody does it. Bowel movements can vary in appearance; however, certain presentations can be more concerning than others. Black stool, for example, can be due to something as simple as eating black candy, or something more severe, like an underlying condition.

What makes your poop black

Though there are some severe causes, most instances of black stool can are due to diet changes, viruses, or other non-life-threatening causes. The following details may help you better understand your symptoms and if and when you need to see a physician.

How to treat and get rid of black or tarry stools

Seek help immediately if you have an illness along with black tarry stool. In some cases, colonoscopy or endoscopy is necessary to check for any tears, polyps, or other bleeding sources in the colon or intestines. Unless you are certain that your dark stool is due to your diet, a doctor's visit is recommended.

Questions your doctor may ask about black stool

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What causes a stool to turn black?

Many foods or medications may naturally cause your stool to change colors, including looking dark brown or black. Common foods known to do this include licorice, blueberries, beets, red-colored gelatin or food made with blood (ie blood sausage).

Why is my stool dark?

But stool that simply seems darker than normal may be the result of dehydration, constipation, or eating dark-colored foods or iron-rich foods or supplements.

Why does my stool have a color?

It may also be affected by your nervous system. Sometimes flare-ups are due to stress, diet, or other changes. IBS can have different symptoms depending on the person, but most experience abdominal cramps or discomfort. IBS may affect the color and consistency of your stool.

Why is my GI bleed red?

Lower GI bleeds tend to be bright red, bloody stools because there’s not enough time for the blood to be digested to turn the stool a darker brown, black, or tarry. The most common causes of lower GI bleeds are diverticular disease and hemorrhoids.

What does it mean when your stool is dark?

Symptoms. If your stool is a darker color than normal, it may indicate internal bleeding. You can have both upper and lower gastrointestinal (GI) bleeds. Upper GI bleeds tend to be from gastritis (inflammation of the stomach lining) or ulcers but there are other causes as well.

Why do I get dizzy when I poop?

Dizziness. If your stool is a darker color than normal, it may indicate internal bleeding. You can have both upper and lower gastrointestinal (GI) bleeds. Upper GI bleeds tend to be from gastritis (inflammation of the stomach lining) or ulcers but there are other causes as well.

How do you know if you have constipation?

Symptoms. Difficulty emptying your bowels or feeling “blocked”. Having fewer than three bowel movements in a week. Hard, pellet-like stool. Abdominal cramping. Constipation can be due to a host of factors, including poor diet, dehydration, being inactive, hormone fluctuations, and a side effect of medication.

Why is my stool black?

Iron supplements, or food that is high in iron, can cause the stool to turn black. A sudden change could indicate that a person is getting too much iron. Black stools in a child could mean that they have consumed too many iron pills.

Why do I have black specks in my stool?

Black specks in stool may be caused by certain foods in the diet or by underlying conditions. Healthy bowel movements are normally a medium brown color and long and smooth in shape. They should not require straining to pass or cause pain. Black specks are more noticeable when the stool is light in color than when it is darker.

What happens to a baby's stool after birth?

Once the baby leaves the womb, their intestines become colonized with bacteria, usually in the first days following birth, and the stool s become gradually lighter. Black stool in a baby older than a week is unlikely to be meconium. Older babies can develop black specks in their stools for the same reasons as adults.

Why is my baby's stool black?

Their stool is dark because they do not yet have the usual friendly gut bacteria that help people to digest their food and have bowel movements.

Why do I have a bulging vein in my throat?

This is because it can cause bleeding in the digestive tract, a complication called esophageal varices or portal hypertension. Esophageal varices are bulging veins in the throat and stomach. They happen when blood flow to the liver is blocked.

Why does stool color change?

Only rarely does stool color indicate a potentially serious intestinal condition. Stool color is generally influenced by what you eat as well as by the amount of bile — a yellow-green fluid that digests fats — in your stool. As bile pigments travel through your gastrointestinal tract, they are chemically altered by enzymes, ...

Why is my stool red?

If your stool is bright red or black — which may indicate the presence of blood — seek prompt medical attention. Food may be moving through the large intestine too quickly, such as due to diarrhea. As a result, bile doesn't have time to break down completely.

What does it mean when you have no bile in your stool?

A lack of bile in stool. This may indicate a bile duct obstruction. Certain medications, such as large doses of bismuth subsalicylate (Kaopectate, Pepto-Bismol) and other anti-diarrheal drugs. Excess fat in the stool, such as due to a malabsorption disorder, for example, celiac disease.

Does bile break down?

As a result, bile doesn't have time to break down completely. Green leafy vegetables, green food coloring, such as in flavored drink mixes or ice pops, iron supplements. A lack of bile in stool. This may indicate a bile duct obstruction.

Causes

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Black stool isn't always due to a big problem. There are many reasons stool could appear black, and iron supplements or even Oreos could be to blame. This is especially true for people who have had ostomy surgery or a colectomy, because the food is not being digested as fully as it is in people who have not had any abd…
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Diagnosis

  • If you're seeing black stools and can trace it back to a food you ate, that's OK. However, a doctor should be consulted immediately if black stools cannot be traced back to a food, an iron supplement, or Pepto-Bismol. The black color alone is not enough to determine that it is in fact blood that is being passed in the stool. Therefore, a doctor will need to confirm whether there ac…
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Symptoms

  • Blood that comes from higher up in the digestive tract, such as the esophagus or stomach, may turn stool black, which is called \"melena.\" As the blood passes through the body and interacts with enzymes in the digestive process, the blood changes from red to black. This makes it a bit …
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Risks

  • If the black stool is accompanied by other symptoms such as feeling faint or actually fainting, dizziness, pain, or vomiting, especially if there's blood in it or it looks like coffee grounds, contacting a doctor immediately is important because it could be a medical emergency. For some people, there may already be a known risk factor for bleeding in the digestive tract. Talk to a doc…
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Signs and symptoms

  • Esophageal Varices. Esophageal varices are dilated veins in the wall of the lower esophagus or upper stomach. When these veins rupture, they may cause bleeding, which can cause blood to appear in the stool or in vomit. Esophageal varices are a serious complication resulting from portal hypertension (high blood pressure) brought on by cirrhosis of the liver.
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Clinical significance

  • Mallory-Weiss Tear. This is a tear in the mucous membrane that joins the esophagus and the stomach. If this tear bleeds, it can result in melena. This condition is fairly rare (only occurring in four of 100,000 people) and may be caused by violent vomiting, coughing, or epileptic convulsions.
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