Gastric mucosal damage is mainly caused by acid reflux. Gastroscopy reveals gastric mucosal congestion, edema, erosion, and bleeding, and the main clinical manifestations include heartburn, acid reflux, nausea, vomiting, and in severe cases, vomiting of blood and black stools. During physical examination, pressure pains in the upper abdomen or perimuscular region can be detected, and the examination is mainly endoscopic. At present, the treatment is mainly based on rest and light diet, and 1-2 meals can be eaten if necessary, and mild cases can recover in a short time. In addition, for patients with severe vomiting or with other symptoms, specific medication is needed to relieve the symptoms at the same time.