There are some black dots on the stool. What's going on?

The main reasons for black spots on stools are dietary factors, unscientific medication, stomach ulcers, etc. The specific analysis is as follows:

1. Dietary factors

If the patient eats a large number of foods containing melanin, such as black sesame, black fungus, black beans, etc., it will increase the melanin in the stool, resulting in black spots on the stool.

2. Unscientific medication

If the patient does not usually take iron according to the doctor's advice, such as ferrous fumarate granules, ferrous sulfate sustained-release tablets, ferrous succinate tablets, etc., iron will react with gastric acid blackening, combined with stool, will lead to the symptoms.

3. Gastric ulcer

If the patient has gastric ulcer itself, there will be a large amount of blood outflow will be oxidized after blackening, so that small black spots appear on the stool.