What are the causes of dark stools?

Always check the color of your stool to avoid overlooking an internal problem. Save Model of a body of the person image by Kitti from Fotolia.com

Dark stool is caused by the bleeding of upper gastrointestinal tract. Generally, we worry when we see blood or feces stained red, but dark tarry stools may indicate that something is wrong and is equally worrying that the red, which are obviously bloody stools.

Pay attention

The tarry black stools are called hair and are often malodorous. When your stools are black, you may not notice that something is happening, as if would happen if they were red and obviously with blood. When blood in the stool is minimal or is in the form of tarry black stools, can only be detected through a stool test, you should realize yourself in your annual doctor visit.


When the stools are black means that bleeding has occurred in your rectum, large intestine or anus, which are parts of the lower gastrointestinal tract. This also means that no hemorrhoidal blood, which is usually red and fresh. It also eliminates diverticulitis, which happens when bags develop in the colon, which result in red blood in the stool.


Bloody stools that originate in the upper gastrointestinal tract become black because they are in your system longer and are exposed to the juices produced by the digestive system. If you're bleeding in your stomach, esophagus or small intestine takes a while for blood to leave, and when it does, it gives a black color to your stool. The bleeding in the upper gastrointestinal tract may be caused by inflammation resulting from taking medicines such as naproxen, ibuprofen or aspirin. Stomach ulcers can also cause bleeding, resulting in black stools.

possible influences

According to ourgardengang.com, drinking red wine or eating black licorice can cause black stools. Iron pills, Pepto-Bismol and meals full of paprika can also cause black stools. However, if your stools are black and have not consumed any of the above need to consult your doctor.


Ideal bowel movement is soft stools that float on top of the toilet water. They are brown, not red or black. Loose stools move faster through your system than those that are hard, which helps prevent constipation and hemorrhoids, and puts you at lower risk of developing diverticulitis, which is essentially a hernia in the ascending colon. According to ourgardengang.com, eat enough fiber resulting in soft stools or "floaters".