Your digestive or gastrointestinal (GI) tract includes the esophagus, stomach, small intestine, large intestine or colon, rectum, and anus. Bleeding can come from any of these areas. The amount of bleeding can be so small that only a lab test can find it.
Signs of bleeding in the digestive tract depend where it is and how much bleeding there is.
Signs of bleeding in the upper digestive tract include
Bright red blood in vomit
Vomit that looks like coffee grounds
Black or tarry stool
Dark blood mixed with stool
Signs of bleeding in the lower digestive tract include
Black or tarry stool
Dark blood mixed with stool
Stool mixed or coated with bright red blood