Green stools may be caused by dietary factors, medications and certain pathological factors. 1. Dietary factors: Eating a lot of green food and drinks can lead to greenish stool color, which is caused by certain pigments in food or drinks. 2. Drug factors: the abuse of antibiotics can lead to intestinal flora imbalance, resulting in greenish-colored stools, accompanied by irregular stools. 3. Pathological factors: Dyspepsia or other digestive diseases may cause abnormal stool color. For example, bile reflux gastritis, the color of stool may be greenish. If the symptoms of greenish stools persist, it is recommended to consult a doctor to find out the cause of the problem.