Black Bowel Movement
Black Bowel Movement

Black Bowel Movement: 5 Causes, and Signs of Certain Diseases

Human feces are the residual metabolism of the digestive system. The shape and color of the feces can vary. But in general, the stool has a semi-solid characteristic that is coated with mucus and light brown to dark brown.

A black bowel movement is a condition in which the stool changes color to a very dark one to blacken. This includes the normal thing, if the cause is food. Consumption of drugs, or iron supplements. However, black stool can be a sign of bleeding (Melena) if it is accompanied by other symptoms, such as headache, decreased appetite, abdominal and rectum pain, fecal odor, flatulence, as well as nausea and vomiting.

Various causes of black bowel movement

Many factors may cause feces to be black. These factors include:

Consumption of certain foods

Black feces is not always as an indication of serious illness, because certain food consumption can also cause black stool. Food consumption in dark blue, purple, and black like blueberries and beets for example, can make your feces turn black.

Take certain drugs

In addition to food influences, certain medications can also cause black-colored feces. For example, the bismuth subsalicylate drug type contributes to the black color of your stool. Consumption of supplements that contain iron can also make feces become black.

Bleeding of the gastrointestinal tract

In some cases, black bowel movement is a sign of a serious illness, such as the upper gastrointestinal bleeding. Bleeding may occur in the esophagus or stomach.

In addition to black stool, it will generally be accompanied by other symptoms such as blood vomiting or black liquid vomiting resembling a coffee solution, stomach cramps, shortness of breath, dizziness and fatigue. One of the causes of upper gastrointestinal bleeding is gastric infection.

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Severe cirrhosis can be a cause of black feces. This occurs because the blood flowing to the liver is blocked by the scar tissue that is formed in the liver. So there is a blood buildup in the veins around the esophagus and stomach.

The blocked blood in the blood vessel can rupture and cause internal bleeding. These signs of internal bleeding can be seen from the condition of vomit or feces of sufferers.

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Black Bowel Movement, Signs of certain diseases

Sometimes these black stools are mixed with blood in certain conditions. You have to be aware of it so as not to harm yourself.

Peptic ulcer

These ulcers usually develop in the inner lining of the stomach or the small intestine. Usually it can be caused by bacteria, excessive smo**king, alco**holic beverages or taking medication. This can result in black stools in older people during defecating.


Some types of cancer can cause black stool discharge. Black stools can also be a symptom of stomach cancer. In this type of cancer, healthy cells turn into cancer for a certain time in the inner lining of the stomach.


Malignant tumors can also cause black stool in older people. This type of Tumor usually targets the esophagus and stomach and can cause dirt black.

Varices Esophagus

Black stools such as tar can be symptomatic of the esophageal varices. This occurs when blood flows to the liver clogged. Veins that swell in the esophagus, precisely near the stomach, can be damaged and bleed.


This is the condition that causes the stomach lining to become inflamed. This problem often occurs in everyday life. The reason is because of the wrong meal can form ulcers in the stomach lining.


Colitis is known as a colon condition to be inflamed. This condition can also cause black stools. You should avoid the risk factors of colitis.

Alcohol-related liver disease

Liver damage caused by drinking excessive alco**hol can lead to black stools. Therefore, you should not misuse alco**holic beverages because it affects serious illnesses.

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Thank you very much for reading Black Bowel Movement: Causes, and Signs of Certain Diseases, hopefully useful.

Last Updated on September 9, 2021 Reviewed by Market Health Beauty Team