There are many reasons for green stools, common reasons are: 1, recently eat a lot of green vegetables, such as spinach, leeks, celery, etc., can lead to green or dark green stools, which is a normal phenomenon, do not need special treatment to improve the diet structure after the symptoms can disappear. 2, gastrointestinal inflammation, such as acute enteritis, bacillary dysentery, etc., the patient is often accompanied by nausea, vomiting, abdominal pain, diarrhea, fever and other symptoms. At this time, we should pay special attention to dietary management, give a light, easy to digest diet, avoid spicy, stimulating food, it is recommended to do routine blood and stool routine, after the diagnosis is clear, you can give antibiotic treatment, such as safranin, enterococcinosis, flupirtatious acid, etc. 3, long-term use of anti-inflammatory drugs or take other colorful medicines, the stool will be green, which is a normal phenomenon, the symptoms can disappear after stopping the drug. This is a normal phenomenon and the symptoms will disappear after stopping the medication.