The dietary contraindications for patients with duodenal bulb ulcers are as follows: 1. prohibit high-fiber foods; 2. eat more fine foods; 3. eat more vegetables such as cabbage, cucumber and tomatoes; 4. eat more easily digestible fruits such as apples, peaches and pears; 5. avoid drinking strong tea, coffee and chocolate; 6. prohibit eating foods that stimulate the stomach and intestines such as chili, mustard, garlic and onions; 7. quit smoking and alcohol. Patients are advised to have small and many meals, small and many meals can neutralize stomach acid, reduce the stimulation of stomach acid on the ulcer surface, and can supply nutrition, which is conducive to the healing of the ulcer surface, more suitable for acute peptic ulcer.