Chronic gastritis is a common and frequent clinical condition that occurs in all age groups and accounts for about 80-90% of patients undergoing gastroscopy, more in men than in women, with the incidence gradually increasing with age. Most patients with chronic gastritis caused by H. pylori may be asymptomatic; those with symptoms may show symptoms of indigestion such as epigastric pain or discomfort, epigastric distention, early satiety, belching, and nausea. The presence or absence of these symptoms and their severity do not correlate definitely with the endoscopic findings and histopathological changes of chronic gastritis. Patients with autoimmune gastritis may also present with anemia. Definitive diagnosis must rely on gastroscopy and histopathological examination of the gastric mucosa biopsy. H. pylori testing can help in the etiologic diagnosis. Autoimmune gastritis should be suspected by testing for relevant autoantibodies and serum gastrin. The following principles should be followed to prevent the occurrence of chronic gastritis than to treat it: 1. Keep your mind happy Mental depression or excessive stress and fatigue can easily cause pyloric sphincter dysfunction, bile reflux and chronic gastritis. 2, should quit smoking and avoid alcohol The harmful ingredients in tobacco can cause an increase in gastric acid secretion, which has a harmful stimulating effect on the gastric mucosa, and excessive smoking can cause bile reflux. The actual fact is that you can get a lot more than just a few of these. 3, caution, avoid using drugs that damage the gastric mucosa long-term abuse of such drugs can cause damage to the gastric mucosa, thus causing chronic gastritis and ulcers. 4, avoid too acidic, too spicy and other irritating food and cold indigestible food when eating to chew slowly, so that the food fully mixed with saliva, conducive to digestion and reduce stomach irritation. Diet should be regular, nutritious and contain more vitamin A, B and C food. Avoid taking strong tea, strong coffee and other stimulating drinks.