2, eating a lot of meat and animal offal can also lead to melena, which is completely normal.
3. If this is not the case, then black stool is probably caused by bleeding in your digestive tract or gastrointestinal tract.
4. It may be caused by long-term non-defecation or constipation. Constipation can easily lead to black stool, so maintaining good defecation habits is very beneficial to the body.
5, chronic gastric bleeding, will also make the stool color black.
6, related to drugs, patients with stomach diseases eat stomach medicines containing bismuth, patients with iron deficiency anemia often supplement iron, and the stool will be black. Charcoal and some black Chinese patent medicines can also cause black stool. This kind of black is dull carbon-like black with different shades.