Stool is often the cause of black

Stool often black may be caused by dietary factors, drug factors and peptic ulcer, details are as follows:

1, dietary factors

If the patient often eats pig blood, duck blood and other animal blood products, the iron element in the food will be oxidized in the intestinal tract, forming black iron sulfide, resulting in black stool color.

2, drug factors

If the patient takes ferrous sulfate, ferrous succinate, ferrous lactate and other drugs for a long time, the iron element in the drug will be oxidized in the intestinal tract, resulting in black stool color.

3, peptic ulcer

Peptic ulcer can cause upper gastrointestinal bleeding, when the blood is oxidized in the intestinal tract, it can produce black stool.