Whether chronic atrophic gastritis is serious or not depends on the patient’s condition. Mild patients are usually not serious, and can be reversed in some patients with aggressive treatment. Moderate or severe patients may develop intestinal chemosis, which is then relatively serious. Chronic atrophic gastritis is a condition in which the epithelium of the gastric mucosa suffers repeated damage under the action of Helicobacter pylori infection, duodenal reflux, and other factors, and there is a kind of lesion in which the intrinsic glands are atrophied, which may or may not be accompanied by intestinal metaplasia. Mild chronic atrophic gastritis is usually not serious, patients usually have no obvious symptoms, some patients may appear abdominal distension, acid reflux, loss of appetite and so on. At this time, after active treatment, the disease can be effectively controlled, and some patients can even be reversed. However, patients with moderate and severe chronic atrophic gastritis will have obvious abdominal pain and bloating, postprandial fullness, acid belching, nausea and other symptoms, and some patients may also be accompanied by intestinal epithelial hyperplasia (intestinal epithelial transformation of the intestinal mucosa into the mucosal cells of the large intestine or the small intestine), which is a kind of pre-cancerous lesions, and if it is not treated in time and treatment, it may develop into gastric cancer, which will be relatively more serious. Patients with chronic atrophic gastritis are advised to consult a doctor in time and receive treatment actively to avoid delaying their condition.