The stomach rub can promote the peristalsis of the stomach and intestines, help gas out of the anus, so there will be exhaust, mainly for the following reasons: 1, eat a lot of gas-producing food, gas-producing food such as potatoes, sweet potatoes and other potatoes, as well as soy products, dairy products, onions, broccoli, cabbage and carbonated beverages, in general should eat less gas-producing food. 2, the spleen and stomach digestive function is reduced, can not be timely eat into the The actual fact is that you can find a lot of people who are not able to digest the food in the body, and the excessive fermentation will produce a lot of gas. 3, when the weather is cold, people inhale a lot of cold air outside or when the abdomen is cold, it will also lead to the presence of too much gas in the body. 4, the exhaust of the intestinal tract is also related to the intestinal flora, patients with poor digestive function of the spleen and stomach can often easily rub the stomach, which can promote digestion and help improve the constipation.