Flatulence arises for many reasons. The common onset site is in the stomach. 1, inhaling too much gas, eating in the wrong way, too fast, talking while eating, swallowing a lot of air. 2, eating a lot of food that can easily produce gas, such as onions, groundnuts, potatoes, high sugar, fruits. 3, overeating, too much food accumulation in the stomach fermentation decomposition produces a lot of gas, should be more exercise after meals. 4, certain gastrointestinal diseases, such as chronic gastritis, gastric ulcer, gastrointestinal dysfunction, can also produce flatulence. 5, gas discharge in the gastrointestinal tract, such as habitual constipation, intestinal obstruction. 5, gas discharge in the gastrointestinal tract is blocked, such as habitual constipation, intestinal obstruction, etc. Dimethicone oil can quickly expel gas to relieve bloating. Chew and swallow slowly when eating, match food reasonably, exercise more and avoid being sedentary.