Duodenal bulb ulcers are divided into active, healing, scarring and active stages, which are also divided into A1 and A2. A2 stage refers to the white congested margin and annular margin around the ulcer. For the A2 stage of duodenal bulb ulcer treatment: 1. Ask the patient to pay attention to the regulation of diet, light diet, avoid spicy and acidic food. 2. Use drugs to reduce gastric acid secretion, such as Nexium, Pantoloc and Omeprazole, and drugs to repair gastric mucosa and duodenal mucosa, such as membrane Gustav. After adhering to anti-ulcer medication for six weeks, the gastroscopy should be reviewed again.3. If there is a duodenal bulb ulcer, it is recommended to go for a carbon 14 breath test to assess whether there is H. pylori infection. If there is H. pylori infection, further killing of H. pylori is required.