What are the symptoms of blackness?

The occurrence of black stool may be caused by bad lifestyle, drug use, upper gastrointestinal bleeding and other reasons, as follows:

1. Bad lifestyle

For people who drink strong tea and coffee for a long time, it may stimulate excessive secretion of gastric acid, which is easy to damage the gastric mucosa and cause black stool.

2.

People who use iron drugs may cause iron sulfide to be produced in the body, resulting in changes in stool color.

3. Upper gastrointestinal bleeding

When blood enters the stool, oxidation will occur, resulting in black stool.