The main causes of flatulence: the increase of gastrointestinal gas is mainly due to the increase of gas entering the gastrointestinal tract from the outside, the increase of gas produced by the gastrointestinal tract, and the decrease of gas absorbed and discharged by the gastrointestinal tract. 1. Swallow a lot of gas 2. Gastrointestinal obstruction 3. Food fermentation. Drug action 5. Helicobacter pylori infection. Gastrointestinal motor dysfunction. The amount of gas diffused from blood to gastrointestinal tract increases. Diet pills have nothing to do with treating flatulence. It is recommended to eat drugs or food specially for flatulence.