The toilet stool is black, what is the problem

The toilet stool is black, may be caused by food factors, drug factors, disease factors and other reasons, as follows:

1, food factors

If eating iron-rich foods, such as pig liver, pig blood, chicken blood, duck blood, beef, etc., or eating dark green vegetables, such as spinach, leek, etc., iron element in the intestinal tract to form iron sulfide, will cause stool color change.

2, drug factors

If eating bismuth-containing drugs, such as bismuth potassium citrate, colloidal pectin, bismuth aluminate and other drugs, bismuth components after oxidation, will appear stool black phenomenon.

3, disease factors

occur gastric ulcer, duodenal ulcer may appear mucosal bleeding, blood into the stool, oxidation will appear stool black phenomenon.