Asphalt poop
The upper digestive tract or small intestine bleeds and stays in the intestine for a long time. After the red blood cells are destroyed, hemoglobin combines with sulfide in the intestine to form ferrous sulfide, which makes the stool black, and it is shiny due to the mucus, similar to tar , So it is also called tar stool.
The material in this site is intended to be of general informational use and is not intended to constitute medical advice, probable diagnosis, or recommended treatments.