H. pylori is one of the causes of gastric cancer, but it does not mean that infection with H. pylori will definitely lead to gastric cancer, only that it has a higher chance of getting gastric cancer compared with patients who are not infected with H. pylori, so it is not a matter of time. In addition to H. pylori infection, it may also be related to geographical environment, diet and living habits, genetics and pre-cancerous lesions. Therefore, when H. pylori infection is detected, do not be overly nervous, as it can be cured through timely and standardized treatment and generally will not lead to cancer. However, if it is not treated in time or improperly treated, gastric cancer may occur. H. pylori is also clearly related to the development of gastric ulcer, duodenal ulcer and other diseases, and should be treated promptly once detected.