Tummy gas has the following reasons: 1, too much gas swallowed: talking or eating too fast during meals are easy to swallow a lot of gas, which leads to more gas in the stomach; 2, eat a lot of food that can easily produce gas: such as food with high starch content, bean food, potato food, etc., will produce a lot of gas in the stomach and intestines, leading to more gas in the stomach. In addition, drinking carbonated beverages, soda water, etc. will also appear more gas in the stomach; 3, stomach diseases: such as gastric ulcer, chronic gastritis, superficial gastritis, etc., these diseases will lead to more gas in the stomach, as well as abdominal pain, increased exhaust and other symptoms; 4, intestinal diseases: such as colitis, intestinal cancer, etc., these diseases will lead to slow peristalsis of the intestines, the stool will accumulate in the intestines, be decomposed by bacteria will produce a lot of gas 5, lack of exercise: sitting still for a long time, gastrointestinal peristalsis becomes slower, the gas in the stomach and intestines can not be smoothly discharged, there will be more gas in the stomach.