Frequent belching (burping) after drinking soda is mainly caused by the gas in the soda overflowing in the stomach. Soda refers to a certain amount of carbon dioxide sealed compression dissolved into a specific method of preparation of the solution to form a carbonated beverage, has been widely popular in China, after drinking a certain amount of soda, people may appear frequent belching phenomenon, which is due to the gas in the soda in the stomach constantly overflow. The temperature inside the stomach is usually around 37 degrees Celsius, similar to the normal body temperature of the human body, and a little higher than the outside air temperature. The heat of the soda after entering the stomach will reduce the solubility of the gas, so the carbon dioxide gas incorporated into the drink will be separated from the soda again, and spill out from the mouth along the esophagus, a phenomenon also called belching.