Belly rubbing appears as a result of excessive gas gathering in the stomach and is commonly seen in the bodies of patients with indigestion and insufficient gastric power. The main function of the stomach is to store and digest food, and some people’s diet causes a large amount of air to enter the digestive system, resulting in intestinal flatulence. The gas in the stomach is gradually released when the stomach is rubbed, and some of the gas is discharged through the esophagus in the form of burping. When indigestion occurs, the digestion time of food in the stomach is relatively prolonged, and a large amount of gas is produced in the stomach, which is released when the stomach is rubbed, resulting in hiccups due to increased pressure in the stomach. Some people have insufficient gastric power and their stomachs are unable to stir and grind food. When the stomach is rubbed, the peristaltic capacity of the stomach increases, so that food can be digested and decomposed quickly, and the gas produced will be expelled by burping.