The difference between gastritis and gastric ulcer is that gastric ulcer may be more severe in terms of clinical manifestations, manifesting as postprandial pain, which is usually more pronounced half an hour to an hour after a meal, but relieved when hungry. It is more likely to occur every year in spring and autumn, that is, from the first autumn to the second spring, and can be relieved by taking acid suppressants. This is the clinical manifestation of gastric ulcer, which is chronic, periodic, and rhythmic epigastric pain, accompanied by heartburn and acid reflux, and in some patients, nausea, vomiting, vomiting blood, and black stool. In contrast, the clinical manifestations of gastritis are relatively mild, manifesting as abdominal fullness and discomfort, which are related to climate change, but the relationship is not particularly obvious, and the regular pain is not particularly obvious. The more important difference lies in the endoscopic presentation. Gastric ulcers mainly show ulcers that are relatively deeper than gastritis, while the endoscopic presentation of acute gastritis is mucosal congestion, edema, and erosion, and the difference between endoscopic ulceration and erosion is depth. In endoscopic gastritis is in the mucosal layer, up to the submucosal layer, while ulcer is deep to the mucosal muscle layer, above are the differences between the two in clinical manifestations and endoscopy.