Chronic gastritis is divided into two types: chronic non-atrophic gastritis and chronic atrophic gastritis. The first type, chronic non-atrophic gastritis. Most patients do not have any symptoms, and a few patients can have non-specific indigestion symptoms such as epigastric pain, discomfort, epigastric distention, early satiety, belching, nausea, etc. The second type, chronic atrophic gastritis. Some patients can have burning pain, distension, dull pain or stuffiness in the upper abdomen, and most of these complaints are more obvious after meals. Some patients can have symptoms such as lack of appetite, nausea, belching, constipation or diarrhea. If chronic gastritis is accompanied by gastric mucosal erosion, there may be a small or large amount of upper gastrointestinal bleeding, manifested as black stools or vomiting blood, which can cause iron deficiency anemia if there is a small amount of bleeding for a long time. Patients with gastric body atrophic gastritis can develop pernicious anemia, often with general weakness, weakness, indifference, and occult jaundice, when it gastrointestinal symptoms are generally less. In summary the clinical presentation of chronic gastritis lacks specificity and its severity does not correlate with endoscopic severity.