Gastric ulcers are serious enough to get stomach cancer, and a few of them can become cancerous. For long-term chronic gastric ulcers recurring writer, the age of 45 years old and above, the ulcer stubbornly not healed people should be more vigilant. Gastric ulcer cancer occurs at the edge of gastric ulcer, which will first appear inflammation and erosion, then regeneration and heterogeneous hyperplasia, and finally develop into gastric cancer. Therefore, if a patient clearly suffers from gastric ulcer, especially gastric ulcer caused by Helicobacter pylori infection, it is recommended that regular and active treatment must be given under the guidance of a gastroenterologist. The purpose of gastric ulcer treatment is to eliminate the cause of the disease, relieve the symptoms, heal the ulcer, prevent recurrence and prevent complications. At the end of the treatment, there will be repeat e-gastroscopy and carbon 13 or carbon 14 breath test until the ulcer is completely healed.