The poop is black and green. What's going on?

When defecation appears black green stool, first of all, the patient can consider the symptoms caused by eating a large amount of green food in a short time, such as celery, cabbage, chrysanthemum and other vegetables; secondly, the patient's gastrointestinal tract function is weak, and indigestion occurs after eating, resulting in black green stool discharge phenomenon; it can also be considered that the patient has acute and chronic gastritis, acute and chronic enteritis and other diseases, which are easy to accompany the above symptoms. It is suggested that patients eat more light and digestible foods at ordinary times to reduce the burden on gastrointestinal tract, improve the situation of black and green stool, and take probiotics to regulate gastrointestinal tract according to doctor's advice.