The main clinical symptoms of chronic gastritis include dull pain in the upper abdomen, a feeling of fullness after meals, acid reflux, or reduced appetite in patients. The severity of symptoms does not necessarily correspond to the extent of gastric mucosal lesions. Since chronic gastritis lacks specific symptoms, most individuals may experience no symptoms or various degrees of indigestion. Chronic atrophic gastritis primarily leads to symptoms like anemia, weight loss, diarrhea, among others. Additionally, patients with erosive gastritis may experience more pronounced upper abdominal pain, potentially accompanied by vomiting blood, black stools, and irregular abdominal pain. Severe cases could lead to intense colic pain.