Duodenal ulcer is a kind of peptic ulcer, which is caused by excessive acid in the stomach and leads to the appearance of ulcers with congestion in the duodenal mucosa. The patient will have reflux, heartburn and epigastric pain. For patients with duodenal ulcer, it is recommended to drink some black tea. Black tea has the effect of warming the stomach and nourishing the stomach, which will not lead to excessive secretion of stomach acid, thus aggravating the symptoms of duodenal ulcer. Green tea, on the other hand, is too cold to stimulate the secretion of gastric acid, thus aggravating the symptoms of peptic ulcer patients. Therefore, it is recommended that patients with duodenal ulcers should preferably drink some black tea, and the taste should be lighter, not to make the black tea too thick, otherwise it will also hurt the duodenal ulcer.