You can rub your stomach, walk slowly and take medication to promote digestion if you have an upset stomach after eating too much food. 1. Rubbing the stomach: It is recommended to massage the abdomen clockwise around the umbilicus with your hand to speed up the peristalsis of the gastrointestinal tract and relieve the symptoms of an upset stomach. 2. After eating too much food, you can walk slowly and drink a lot of water to promote gastrointestinal peristalsis, promote digestion and relieve the symptoms of an upset stomach. 3. Taking medication: You can take appropriate amount of gastric power drugs such as domperidone, gastrointestinal tablets and so on to promote digestion and relieve the symptoms of an upset stomach. It is recommended not to overeat in three meals a day, maintain a regular diet, eat more fresh vegetables and fruits, etc., if the stomach is not relieved for a long time also need to consult a doctor in time, the above drugs need to be taken under the guidance of a professional doctor.