Gastric problems usually include gastritis, gastric ulcer, and even duodenal ulcer, which are also generally known as gastric diseases. Green tea is cool in nature and has the effect of clearing heat and relieving summer heat, benefiting the vital energy and promoting the production of body fluid, so if the nature of gastric disease belongs to the cold nature, it is not suitable for drinking green tea. In addition, tea contains acid, which can easily combine with the protein in the stomach to form a precipitate that is not easy to digest and may aggravate the symptoms of stomach problems. In general, the cold stomach disease is not suitable for drinking green tea, at the same time, should not drink green tea immediately after eating, especially high protein food, stomach disease is generally not suitable for spicy, stimulating food, cold, stiff, deep-fried, barbecue these are not suitable for consumption. The best is a little light and easy to digest food, diet is best fixed food quantitative, do not overeat or hunger and satiety.