The difference between duodenal ulcer and duodenitis lies in the depth of the lesion. Duodenal ulcer is a chronic ulcer that occurs in the location of the duodenum, where the mucosal defect of the ulcer exceeds the mucosal muscle layer. Duodenitis is an inflammatory lesion confined to the mucosal layer of the duodenum and does not exceed the mucosal layer, much less reach the muscular layer, so it can also be simply understood that duodenal ulcers are more serious compared to duodenitis. If the duodenitis is further aggravated, there may be erosion, and the erosion will develop into a duodenal ulcer in depth. The actual fact is that you will need to be able to use anti-ulcer medication with your specialist. Patients with duodenitis can use acid-suppressing and stomach-protecting medications appropriately. The main thing is to use the medication according to the clinical symptoms, the specific need to consult the specialist.