Chronic gastritis is a chronic disease that is caused by various harmful factors that repeatedly act on the body and cause the disease, its onset is mainly related to the following factors: 1, physical factors, long-term consumption of strong tea, alcohol, coffee, too cold, too hot, too rough food, can lead to damage to the gastric mucosa; 2, long-term use of aspirin and other antipyretic analgesics, can destroy the gastric mucosal barrier; 3, smoking, nicotine in tobacco Not only affects the blood circulation of the gastric mucosa, but also can cause bile reflux into the stomach, damaging the gastric mucosa; 4, bile reflux, various causes of bile reflux can damage the gastric mucosal barrier; 5, H. pylori, H. pylori is a pathogenic bacteria specifically hosted in the human gastric mucosa, recent studies have shown that it is the main cause of chronic gastritis.