The reasons why atrophic gastritis is the most common disease among the elderly generally include physiological factors and pathological factors, such as organ function degeneration, complications, emotional factors, low immunity and chronic diseases. 1. Physiological factors: with the increase of age, all the organs of the body of the elderly will gradually deteriorate in function, and the gastric glands will deteriorate and atrophy, which will induce atrophic gastritis. 2. Pathological factors: chronic superficial gastritis, if not actively treated, can also cause atrophic gastritis; the elderly long-term thinking and worrying, long-term tension, anxiety and depression and other emotions, can also cause the gastric mucosa barrier function decline, causing atrophic gastritis; the elderly immunity is reduced, easy to get infected with viruses or bacteria, which in turn triggers atrophic gastritis. In addition, some hypertension and diabetes and other chronic diseases, as well as long-term use of drugs, such as non-steroidal anti-inflammatory drugs, can also lead to gastric mucosal damage, induced atrophic gastritis. It is recommended that the elderly need to go to a regular hospital to receive relevant examinations, and after diagnosis, actively under the guidance of specialists in the treatment.