What causes black stools

Black stool refers to black stool. The causes of black stool are usually dietary factors, drug factors, disease factors, etc.

1. Dietary factors

If the patient eats a large amount of black beans, black sesame seeds, black rice and other foods, it is easy to cause excessive melanin intake, resulting in changes in stool color and black stool.

2. Drug factors

If the patient takes ferrous gluconate syrup, dextran iron tablets, ferrous sulfate tablets and other drugs according to the doctor's instructions, the iron contained in the above drugs will form black substances after oxidation in the intestinal tract, resulting in black stool.

3. Disease factors

If the patient suffers from gastrointestinal bleeding, the blood will undergo chemical changes under the action of digestive substances such as gastric acid, pancreatic juice, intestinal juice, etc., resulting in black stool.