When gastritis is accompanied by intestinal metaplasia, atrophy and atypical hyperplasia, it belongs to the more serious gastritis and must be paid great attention to! First, erosion is a gastroscopic manifestation, intestinal metaplasia, atrophy and atypical hyperplasia, etc. are pathological manifestations seen in pathological sections and magnified 400 times under the microscope, that is, the evolution of a single layer of columnar epithelium of the stomach into a complex layer of columnar or small intestine type or large intestine type epithelial cells with brush-like villi, called intestinal metaplasia; glandular thinning compared to normal glands called atrophy; normal cells evolved into non-normal cells called atypical hyperplasia or neoplastic changes. All of these changes can be classified as mild, moderate or severe, and can coexist or exist separately. All of these pathological changes have a certain probability of becoming adenocarcinoma, so they are recognized as precancerous lesions of the stomach and must be taken seriously. Secondly, a carbon 13 or carbon 14 breath test must be done to see if there is H. pylori infection. If it is positive, it should be eradicated (usually with a quadruple sterilization program), as its presence will accelerate the cancer process. Third, adhere to the treatment: the program should be personalized. Fourth, regular review of gastroscopy and pathology, moderate atrophic gastritis, it is recommended to review half a year. Fifth, diet, avoid foods containing preservatives, such as pickles, sauerkraut, canned foods, ham, puffed eggs and unfresh moldy foods, etc., and quit smoking and alcohol.