Gastric mucosal injury is asymptomatic in a few patients, but most patients will experience gastrointestinal reactions such as nausea and vomiting, and in severe cases, ulcers, bleeding and perforation may even occur. The human gastric mucosa has a barrier function, which can protect the stomach from external factors. When gastric mucosa damage and regeneration occurs, generally mild gastric mucosa damage has no obvious symptoms. However, most patients will experience nausea, vomiting, epigastric discomfort, abdominal pain, belching, bloating and other gastrointestinal reactions, and in severe cases, it will also lead to mucosal edema, hemorrhage, and even ulcers, perforation and other symptoms. In daily life, patients with gastric mucosal injury should follow the doctor’s instructions to regulate the use of acid-suppressing and gastric mucosal protection drugs, such as omeprazole, aluminum sulfate, aluminum hydroxide, etc., and usually choose light, easy-to-digest food, quit smoking and limiting alcohol to avoid eating cold, spicy and other stimulating foods to protect the gastric mucosa. It is recommended that patients with gastric mucosa damage, go to the hospital in time.