Gastric erosion is a shallow ulcer confined to the gastric mucosa. Its depth does not exceed the mucosal muscle layer, and some people consider it to be the early stage or pre-stage of gastric ulcer. It should be noted, however, that not all gastric erosions develop into gastric ulcers. It is generally referred to as acute erosive gastritis, or hemorrhagic gastritis, or acute gastric mucosal lesions, and sometimes the duodenal mucosa can also become eroded and cause bleeding. Gastric erosion is a type of gastric disease. There are usually signs of erosion, such as pain in the stomach an hour after a meal, pain in the stomach sometimes in the middle of the night, and a similar situation an hour before a meal. Diet should be rich in nutrients and easy to digest. Normally, foods that are rich in nutrients, contain little residue, are easy to chew and easy to digest are appropriate. Peptic ulcer refers to the tissue damage of the gastrointestinal mucosa caused by the digestion of the gastric digestive juices themselves over the mucosal muscle layer, and can occur in any part of the digestive tract, of which the stomach and duodenum are the most common. That is, gastric ulcer and duodenal ulcer, their etiology, clinical symptoms and treatment methods are basically similar, and clear diagnosis mainly depends on gastroscopy. Gastric ulcer is the most common type of peptic ulcer, which mainly refers to the tissue damage of the gastric mucosa beyond the mucosal muscle layer caused by the digestion of gastric digestive juices itself. Gastric erosion is different from gastric ulcer. Gastric ulcer is a penetration of the mucosal muscle layer, which inevitably leaves a fibrous scar after healing, covered by a layer of epithelium, and the mucosal muscle layer cannot be regenerated. Gastric erosion is defined by the fact that it does not penetrate the mucosal muscle layer and thus heals without leaving any trace.