Stool with undigested leaves may be caused by physiological reasons such as dietary factors or pathological factors such as proctitis, acute gastroenteritis, dyspepsia and so on. 1. Physiological reasons: when patients eat too much fiber in the food, it is not easy to be digested and absorbed by the body, which may lead to undigested vegetable leaves in the stool; insufficient chewing of food may also lead to undigested vegetable leaves in the stool. 2. Pathologic causes: (1) proctitis: proctitis is usually caused by microbial infections, which may lead to undigested leaves in the stool, and may be accompanied by anal drop, diarrhea and other symptoms. (2) Acute gastroenteritis: Acute gastroenteritis may be caused by eating unclean food, and is prone to gastrointestinal tract dysfunction, manifested by diarrhea, undigested food in the stool and other symptoms. (3) Dyspepsia: Patients with dyspepsia will have their digestion and absorption of food affected, and may have symptoms such as vegetable leaves being excreted in the feces. If the above symptoms occur, it is recommended to go to the hospital in time, to clarify the specific cause of the disease under the guidance of a professional physician, and to carry out the appropriate treatment.