If you want to reduce the size of your stomach, you can regulate it through general measures and treat it through surgery if necessary. 1. General measures: long-term overeating may lead to a larger stomach volume, it is recommended to develop regular eating habits, not overeating, to avoid drinking too much soup, so as not to prop up the stomach, each time you eat to keep seven or eight minutes full, and chewing and slow swallowing when eating. Because the stomach has a certain degree of elasticity, if you insist on reducing the amount of food for a long time, the stomach may shrink. 2. Surgery: If the stomach does not shrink after dietary modification, then you need to take gastrectomy treatment under the guidance of a doctor, which can have the effect of shrinking the stomach. It is recommended that people with large stomachs who want to reduce their stomachs should first adjust their diets, i.e., they should reduce the amount of food they eat, and should not eat too much or too fast every time they eat. In addition, some people who do not have the effect of dietary adjustments need to consult a doctor, who will choose the appropriate surgical treatment according to the patient’s condition.