Chronic atrophic gastritis is a chronic gastritis characterized by atrophy of the epithelium and glands of the gastric mucosa, a decrease in number, thinning of the gastric mucosa, thickening of the mucosal base, or with pyloric glandular hyperplasia and intestinal glandular hyperplasia, or with atypical hyperplasia. Concomitant erosion is defined as the presence of a superficial necrotic defect at the same time, but its depth does not exceed the mucosal muscle layer. The symptoms are non-specific and commonly include vague pain in the upper abdomen, bloating, belching, loss of appetite, or wasting and anemia. If there is gastric mucosal erosion, a small amount of upper gastrointestinal bleeding may occur. In cases of pernicious anemia combined with gastric atrophic gastritis, anemic appearance, general exhaustion, weakness, and mental indifference may occur, while GI symptoms may not be obvious, and some patients with erosion or bile reflux. When the lesion extends to the deeper part of the gland, the gland is destroyed, the number is reduced, the lamina propria is fibrotic, and the mucosa is thinned. The risk of developing gastric cancer increases with multifocal atrophy centered on the gastric horn and spreading to the gastric sinus and body, depending on whether it is accompanied by chemosis, such as non-chemosis atrophy and chemosis atrophy. Therefore, although the symptoms of chronic atrophic gastritis with erosion are not specific, when the above symptoms appear, you should visit a hospital for a clear diagnosis and standardize treatment under the guidance of a clinician to avoid aggravation of the disease.