There are three situations. The first is that diet pills themselves will make your stool black. If so, the harm should be great. Second, the common cause of melena is upper gastrointestinal bleeding. If so, you should go to the hospital for a specific examination.

Third: That's toxins and fat in the body, but it's still not recommended to take diet pills. Although it has the effect of slimming for a short time, it will cause dependence. If you don't eat, you will be constipated. It is better to lose weight healthily.

Suggestion: If you are healthy, don't take diet pills indiscriminately, especially if you buy them yourself. If you do, please go to a regular hospital and take diet pills. Also, if this situation continues, go to the hospital for a check-up, because it will definitely be bad for your health.