Diarrhea after diet is mainly considered to be caused by indigestion and intestinal germs infection. In patients with indigestion, the food may cause some stimulation to the intestines and stomach when eating, which may directly cause diarrhea. If the diet is not hygienic and clean, resulting in an unclean diet and germ infections, resulting in an imbalance in the intestinal flora, it may also cause diarrhea. In addition to unclean diet, diarrhea may also be triggered by overeating, inordinate eating or eating too much cold and stimulating food. In addition to the above, chronic gastroenteritis and other diseases may also cause diarrhea after eating. Patients are advised to start with the simplest diet, as well as dietary habits for improvement, and if this condition persists one must seek medical attention.