Atrophic gastritis is mainly characterized by vague pain in the right upper abdomen, belching (hiccups), loss of appetite, postprandial fullness and early satiety, eating can aggravate or alleviate the symptoms, and some patients may have no obvious symptoms. Atrophic gastritis is a chronic gastric disease, mainly characterized by atrophy of the epithelium of the gastric mucosa and the intrinsic glands, as well as a decrease in the number of glands, thinning of the gastric mucosa, or accompanied by pyloric glandular metaplasia, intestinal glandular metaplasia. The most common cause of the disease is Helicobacter pylori infection. In addition, duodenal reflux, gastric mucosal damage factors, autoimmune mechanisms, and genetic factors may also contribute to the development of the disease. Most patients with atrophic gastritis may have no obvious symptoms, and those who have symptoms mainly show non-specific dyspeptic symptoms, including vague pain in the upper abdomen, bloating, belching (burping), acid reflux, nausea, loss of appetite, postprandial fullness and early satiety. Eating may aggravate or alleviate the above symptoms. Patients who experience these symptoms should seek medical attention and receive appropriate treatment to avoid delaying their condition.