A positive carbon 14 urea breath test indicates that the patient has H. pylori infection in the stomach, but it does not reflect the severity of the condition, which may cause gastritis, gastric erosion, peptic ulcer or even gastric cancer. If the patient is examined for gastritis, gastric erosion and H. pylori infection at the same time, the patient can be treated directly for gastritis or gastric erosion without eradicating H. pylori; if the patient is examined for gastric ulcer, the situation is relatively serious and requires immediate eradication of H. pylori, which is often treated by quadruple therapy, commonly used drugs are amoxicillin, clarithromycin, colloidal bismuth plus omeprazole, and the course of treatment is 14 days; if the patient is examined for gastric cancer by gastroscopy, the patient needs to go to surgery. for gastric cancer, it needs to be treated by surgery or radiotherapy or chemotherapy, and the condition is definitely heavy.