Gastritis is a chronic reaction of the stomach mucosa, as long as there is congestion, edema can be called inflammation, there are many kinds of reactions, but also many changes, the more common symptoms are the following: 1, stomach pain, the nature of the pain is diverse, can be bloating, hidden pain, stabbing pain, burning pain, etc., and a kind of stomach discomfort, can not be summarized by pain, is not comfortable, and can not be depicted. 2, acid reflux, heartburn, is due to stomach discomfort caused by gastric reflux into the esophagus, burning-like reaction. 3. dry mouth, bitter mouth, some patients with gastritis will also have dry mouth and bitter mouth symptoms. In addition, there is a significant proportion of patients with gastritis who have no reaction and all symptoms are absent and can only be detected during clinical examination by gastroscopy.