Black poop. What's going on?

Black stools may be related to dietary factors, drug factors and disease factors.

1. Dietary factors such

as eating a lot of green vegetables, or eating more animal blood products, due to the pigment and iron in the food, can lead to black stools.

2. Drug factors

Some drugs, such as potassium bismuth citrate, ferrous sulfate, etc., can also lead to abnormal stool color due to the nature of the drug.

3. Disease factors

Gastric ulcer, duodenal ulcer and gastric cancer can lead to gastrointestinal bleeding, and blood after intestinal bacteria can lead to abnormal stool color, black stool or tarry stool.