There is no data on the exact time of gastritis cancer, and some patients with atrophic gastritis may develop gastric cancer after several years to decades. Gastritis, which refers to acute and chronic inflammation of the gastric mucosa caused by Helicobacter pylori, immunity, infection, alcohol and other factors, can manifest as epigastric pain, abdominal distension, acid reflux, belching, vomiting of blood, black stool and other symptoms. According to the pathophysiological mechanism can be divided into acute, chronic, special types of gastritis. Acute gastritis, gastric mucosal erosion and bleeding can be self-healing or treated with drugs such as omeprazole; most of the chronic non-atrophic gastritis has a good prognosis; chronic atrophic gastritis, especially those who are combined with intestinal epithelial hyperplasia and atypical hyperplasia and patients with family history of gastric cancer need to be highly vigilant against gastritis cancer, and some of the patients can develop gastric cancer in several years to several decades. Gastritis patients should have a light diet and should not consume spicy and stimulating foods, cold and greasy foods, such as fried chicken, salted vegetables, hot pot, and so on. It is recommended that gastritis patients have regular follow-ups and targeted treatment under the guidance of a doctor.