The 4th day of duodenal ulcer examination can eat easy to digest, light food (millet porridge, rice porridge, egg custard, etc.) and drugs (acid inhibitors, gastric mucosa protection drugs, antibiotics, etc.) 1. easy to digest, light food: duodenal ulcer patients digestion and absorption capacity is relatively weak, the diet should eat some easy to digest food, such as millet porridge, rice porridge, egg custard, milk, noodles and other food to reduce the granular food, the friction damage to the gastric mucosa. 2. Drugs: Duodenal ulcer need to take acid inhibitors, such as omeprazole, ranitidine, etc. to inhibit gastric acid secretion, joint application of gastric mucosa protection drugs such as bismuth potassium citrate, colloidal bismuth pectin to promote gastric mucosa repair. If Helicobacter pylori is present, antibiotics such as amoxicillin and clarithromycin are also needed to eradicate the bacteria. Duodenal ulcer patients are recommended to follow the doctor’s instructions to use medication, do not self-medication, so as not to avoid misunderstanding the condition.