A person with atrophic gastritis may gain weight or become thin, and there is no direct relationship between fat and thin and whether the gastric mucosa is atrophic. If a patient with atrophic gastritis has obvious clinical symptoms, such as abdominal pain, bloating, nausea, vomiting, and loss of appetite, he or she may lose weight due to reduced eating and nutrient absorption. If patients with atrophic gastritis do not have clinical symptoms, their appetite is not affected. If there is a long-term, large amount of high-fat diet and high-calorie diet, there is a possibility of obesity. Therefore, whether patients with atrophic gastritis, including patients with other chronic gastritis, will become obese or wasted is related to their own appetite and is not related to the type of gastritis.