The stomach is always bloated, which may be caused by physiological factors, but also due to insufficient gastrointestinal power, intestinal flora imbalance, gastrointestinal diseases and other reasons. 1. Physiological factors: patients consume too much food that is easy to produce gas, such as radish, chestnut, pumpkin, sweet potato, soybean, hawthorn and other foods, which will lead to flatulence. 2. Insufficient power of gastrointestinal tract: Insufficient power of gastrointestinal tract makes the gas that should be discharged from the intestinal tract, can not be discharged in time, which also leads to the old flatulence of the stomach. 3. Intestinal flora imbalance: it is easy to cause indigestion, and a lot of gas will be produced in the intestines, which will lead to the patient’s old flatulence. 4. Gastrointestinal diseases: such as chronic gastritis, gastric ulcer and other gastrointestinal diseases, leading to a decline in gastrointestinal function, which makes the patient appear flatulence. It is recommended that patients who always have flatulence go to the hospital in time to avoid adverse reactions.