Pain 5 cm above the left side of the navel, which corresponds to the projection of the body surface of the stomach, is most commonly associated with acute gastritis after binge drinking or overeating. In addition, a history of gastric ulcer disease in general, after drinking alcohol or eating raw, cold, or hard foods, can also trigger painful episodes, as well as a distinct burning sensation in the upper abdomen, and acid reflux and belching in daily life. Gastroscopy can also reveal congestion and edema of the mucosa of the stomach wall, and in severe cases, ulcer formation, manifesting as erosion. Systematic treatment should be carried out, including paying attention to the structure of the diet, eating a soft diet and staying away from spicy and irritating foods. You can take oral medication to protect the mucosa of the gastrointestinal tract and apply omeprazole dispersible tablets. If there is obvious abdominal distension, you can also take appropriate oral medication to enhance gastrointestinal dynamics, apply morpholine. You should pay attention to proper sports and exercise, and you can also do proper abdominal massage after eating.