Stomach pain three or four hours after meals may be caused by dietary reasons, such as eating too much, eating stimulating food, etc., general conditioning can be restored. It may also be caused by diseases, such as gastritis, gastric ulcer and other diseases, according to the specific circumstances of the choice of omeprazole, domperidone and other drugs. 1. Dietary causes and treatment: such as eating too much can lead to overloading of the stomach; such as eating stimulating food can stimulate the gastric mucosa. It is necessary to avoid such factors and adjust the diet structure and eating habits. 2. Disease causes and treatment: such as gastritis, gastric ulcer can also have acid reflux heartburn and other symptoms, it is not easy to distinguish from the symptoms alone need to be clear with the help of gastroscopy. Proton pump inhibitors (such as omeprazole, lansoprazole), gastrointestinal tract dynamics (such as domperidone, mosapride), mucosal protective agents (such as colloidal bismuth pectin, bismuth potassium citrate) and so on. For the case of stomach pain three or four hours after meals, it is recommended to actively seek medical attention first to clarify the cause before considering specific measures to deal with, the use of medication should be carried out under the guidance of a doctor.