There are many reasons that cause the gas in the stomach to go up after eating, and the common reasons are as follows: 1. Gastrointestinal dysfunction and indigestion caused by improper diet, resulting in the symptoms of gas in the stomach going up after eating. The symptoms of gas in the stomach after eating may occur after eating too fast, eating, talking, overeating, etc. Usually pay attention to the regulation of eating habits, chew slowly, do not eat when angry, avoid eating a lot of too cold food, pay attention to abdominal warmth. 2, eat a lot of food that produces too much gas, such as tofu, soy milk, milk, etc., can also appear this symptom. 3, certain digestive system diseases, such as gastritis, gastric ulcer, duodenal bulb ulcer, etc. Patients who also have acid reflux, ambiguous gas, abdominal distension and other symptoms can take oral pro-gastric motility drugs, such as morpholine, cisapride, mosapride, etc.