Difficult to digest food mainly easy to produce gas, fried food and food with stimulating food, food containing high fiber, as follows: First, easy to produce gas food, easy to produce gas food such as potatoes, sweet potatoes and other potatoes, as well as onions, broccoli, cabbage and other vegetables, as well as dairy products, soy products and carbonated beverages, eat too much will lead to gastrointestinal flatulence, indigestion. Second, fried food, such as fried chicken, French fries, fried food contains a lot of fat, easy to increase the burden on the stomach and intestines, not easy to digest. Third, foods with stimulating properties, including spicy, irritating, too cold, too hot food, such as coffee, strong tea, etc., easily stimulate the gastric mucosa, affecting the digestion and absorption function of the spleen and stomach. Fourth, foods with high fiber, including coarse grains in cereals, such as corn, buckwheat, millet, maize, etc., and green vegetables, such as leeks, celery, oleander, etc.