Older people do not always have atrophic gastritis. The middle-aged and older population just has a higher incidence than other age groups. Atrophic gastritis is a chronic disease of the digestive system caused by multiple pathogenic factors. In the elderly, due to long-term, chronic inflammation stimulating the gastric mucosa, atrophy of the intrinsic glands can occur, thus causing the stomach to secrete gastric juice and pepsin to reduce the ability to affect the normal physiological function of the stomach. There are many other causes of atrophic gastritis, including Helicobacter pylori infection, duodenal-gastric reflux, and autoimmunity. Not only the elderly, but also young people who have irregular diets, often eat stimulating foods, smoke and drink alcohol are prone to develop the disease. Therefore, older people do not always have atrophic gastritis. In addition, patients with atrophic gastritis are advised to go to the hospital in time to avoid delay.