The normal color of stool should be dark yellow and should not appear green. Once the color of stool is green, it indicates that there is a problem with the function of the intestines. When the intestines are infected by bacteria, the bacteria will stimulate the intestines and affect the peristalsis and absorption function of the intestines, resulting in a change in the color of the stool. Viral infections of the intestines will also affect the function of the intestines, which will not only lead to greenish stool color, but also diarrhea as the main symptom. In addition to disease, diet can also cause green stool color. Green vegetables contain a lot of natural pigments, because the natural pigments will not be absorbed by the body, so it will affect the color of the stool. And green vegetables are rich in crude fiber, with the role of promoting intestinal peristalsis, which will lead to thinner stools.