Mild gastritis may have no obvious clinical discomfort, or it may be manifested as mild vague pain in the upper abdomen, abdominal distension, acid reflux and so on. 1. Hidden pain in the upper abdomen: gastritis is an inflammatory change in the gastric mucosa caused by various factors. After the gastric mucosa is damaged, due to the stimulation of gastric contents, pain in the upper abdomen can occur, due to the mild degree of damage, it can be manifested as a hidden pain, which can be relieved after a period of time. 2. Bloating: In addition to the stimulation of inflammation itself will produce abdominal fullness, but also may affect the digestive function and gastrointestinal peristalsis, resulting in gastrointestinal flatulence, thus causing abdominal bloating. 3. Acid reflux: after the gastric mucosa is damaged, the secretion of digestive juices is abnormal, excessive gastric acid and abnormal gastrointestinal dynamics can cause reflux of gastric acid, resulting in acid reflux and heartburn. The specific degree of gastritis needs to be examined by gastroscopy, the above symptoms are recommended to go to the hospital in time, according to the results of the examination of the appropriate formal treatment.