The causes of undigested food with leaves in the stool are dietary factors, gastrointestinal dysfunction, acute gastroenteritis and so on. 1. Dietary factors: such as eating too much leafy food, such as greens, leeks, etc., can aggravate the burden on the gastrointestinal tract, causing temporary indigestion, which can lead to undigested stools with leafy food. 2. Gastrointestinal dysfunction: a group of chronic or recurrent gastrointestinal syndromes, the onset of which is mainly related to mental, psychological factors, diet, immune function. It can lead to intestinal motility disorders, which can lead to undigested leafy food in the stool. It is usually accompanied by abdominal pain, bloating, belching, loss of appetite and other symptoms. 3. Acute gastroenteritis: acute inflammation of the mucous membrane of the gastrointestinal tract, which can make the gastrointestinal peristalsis too fast, resulting in food in the gastrointestinal tract to stay a short period of time, which can lead to undigested food in the stool with leaves, usually accompanied by abdominal pain, diarrhea, fever, nausea, vomiting and other symptoms. There are many other causes of undigested food in the stool, so it is important to pay attention to it, consult a doctor in time to find out the cause of the disease, and follow the doctor’s instructions for further treatment.