Having atrophic gastritis will not always be thin, because there is no necessary connection between atrophic gastritis and wasting. Atrophic gastritis is mainly due to long-term gastric mucosal inflammation caused by HP infection, which leads to gastric mucosal atrophy, intestinalization, heterogeneous hyperplasia, and gastric cancer. After atrophic gastritis, the intrinsic glands of the stomach will be reduced, the acid secretion function will be diminished, and the digestive function may be affected, but as long as the diet is normal, the body will also have a compensatory function, which will not have a great impact on the absorption of nutrients, so it will not be wasted all the time.