What reason is stool black

summary

Many of us have the habit of defecating in the morning. At this time, I don't know if we will pay attention to our own defecation. Sometimes some people's defecation will appear black. Here is to introduce the reason why black stool.

What reason is stool black

First, black stool is a manifestation of upper gastrointestinal bleeding. When upper gastrointestinal bleeding occurs in esophagus, stomach, duodenum, upper jejunum, pancreas and biliary tract, iron in hemoglobin in red blood cells is combined with sulfide to form iron sulfide under the action of intestinal bacteria. It is these chemicals that make stool black.

Second: upper gastrointestinal bleeding, stool color can also become brown, reddish brown or even bright red. When the amount of bleeding in the upper gastrointestinal tract is less, the bleeding speed is slow, and the bleeding stays in the intestinal tract for a long time, the typical tarry black stool may appear. This is actually a color change.

Third: after eating pig blood, sheep blood or chicken, goose, duck blood, or a large amount of beef, pig liver, the iron in animal blood can also form black iron sulfide in human intestinal tract, making the color of stool black. It's not a pathological manifestation, it's just a matter of food.

matters needing attention

Stool black is likely to be caused by food, it may also be caused by some diseases, if you have been black stool, you need to go to the hospital for treatment.