The stool is black, what are the reasons

Stool is black, may be caused by food intake, drug intake, upper gastrointestinal bleeding and other factors, the relevant explanation is as follows:

1. Food

intake contains a lot of iron food, such as black fungus, pig liver, chicken liver and other foods, after intestinal digestion, stool will become black.

2. Drug intake

If the intake of iron containing drugs, will also cause stool black, such as ferrous sulfate tablets, dextran iron tablets, ferrous gluconate syrup, etc.

3. Upper gastrointestinal bleeding Upper gastrointestinal

bleeding is one of the common causes of stool black. When the blood in the digestive tract and gastric acid and enzymes mixed, chemical reaction will occur to produce black pigment, so that stool appears black. Upper gastrointestinal bleeding can be caused by a variety of reasons, such as gastric ulcer, esophageal varices, gastroesophageal reflux disease, etc.