What is the situation when the stool is black

Stool is black consideration and diet factors, drug factors, upper gastrointestinal bleeding and other reasons related.

1, diet factors

because spinach, duck blood, pig blood and other food iron content is high, the human body after eating iron and intestinal sulfide combined to form black iron sulfide, so stool will be black.

2, drug factors

patients take ferrous sulfate, ferrous succinate, colloidal bismuth pectin and other drugs for treatment, drugs will also make stool black.

3, upper gastrointestinal bleeding

gastric ulcer, duodenal ulcer, esophageal and gastric varices and other reasons caused by upper gastrointestinal bleeding, red blood cells in the blood are destroyed, hemoglobin iron and intestinal sulfide combined to form iron sulfide, and then lead to patients stool black.