An upset stomach after eating a large amount of food can be treated with light activity, gastrointestinal stimulant medications such as domperidone. Eating a large amount of food can overload the gastrointestinal tract to the point that indigestion and upset stomach manifestations such as belching (burping), nausea, and loss of appetite occur. Light activities (e.g. walking, gentle abdominal movements, etc.) can be carried out to promote gastrointestinal motility, and medications to promote gastrointestinal motility such as domperidone or gastrointestinal tablets can also be taken at the same time to facilitate relief of the symptoms of stomach discomfort. All of the above medications and exercises need to be carried out under the guidance of a professional doctor. If any of the above situations occurs, please consult a doctor in time for reasonable and standardized diagnosis and treatment.