All the poop is black. What's going on?

Diarrhea is black considering physiological factors, ulcerative colitis, esophagus-gastric varices and other reasons, as follows:

1, physiological factors

If the patient recently ate too much iron-containing food, such as pig blood, duck blood, etc., iron in the process of digestion can be combined with hydrogen sulfide in the intestinal tract, resulting in black stools.

2, ulcerative colitis

ulcerative colitis serious illness can cause large intestine bleeding, if blood mixed with feces oxidation, will cause diarrhea is black.

3, esophagus-gastric varices

If the patient has esophagus-gastric varices, in the event of rupture of cardiac veins, blood can enter the intestinal tract through, and mixed with feces, oxidation, forming black stools.