Non-atrophic gastritis can have symptoms such as nausea, vomiting, and acid reflux. Most people develop non-atrophic gastritis mainly due to irregular diet and frequent overeating, which causes damage to the mucosa of the stomach and causes stomach discomfort and other manifestations. Most patients do not have any uncomfortable symptoms in the early stage of the disease, and the degree of severity is not proportional to the degree of mucosal lesions, but a few patients tend to experience upper abdominal discomfort. Since the mucous membrane is eroded by digestive enzymes and gastric acid inside the gastric juice for a long time, the upper abdominal discomfort tends to appear. After eating, it cannot be emptied by the stomach quickly, so it will cause pressure on the stomach wall will lead to the expansion of the stomach, thus causing stomach discomfort, pain and other manifestations. If the inflammation reaches the pyloric duct near the pyloric valve, the pyloric valve cannot open normally and food cannot enter the duodenum, which will reflexively cause nausea and vomiting, such as increased secretion of gastric acid will also lead to acid reflux and other manifestations.