It is more common for erosive gastritis to develop into gastric ulcers, and the lesions of erosive gastritis are initially confined to the mucosal layer of the stomach. If the patient does not pay attention to it and does not treat it with medication, the erosion of the gastric mucosa will progress to a depth that exceeds the mucosal layer of the stomach and reaches the muscular layer of the stomach, at which point a gastric ulcer will form. The common complications of gastric ulcer are bleeding, perforation, obstruction, and cancer. Therefore, patients with erosive gastritis must follow medical advice and cooperate with the doctor to give regular medication. In addition, gastric mucosal erosion may evolve into gastric cancer, especially in patients with chronic atrophic gastritis with gastric mucosal erosion. Therefore, no matter what type of gastric mucosal erosion is involved, and regardless of the extent of the erosion, patients are advised to follow their doctor’s instructions for regular medication treatment.