H. pylori infection may lead to gastric cancer and is a common cause of gastric cancer. In 1994, WHO declared H. pylori as a class I carcinogen for human gastric cancer. Therefore, people with H. pylori infection need to pay attention to it and consult a gastroenterologist for drug treatment under the guidance of a specialist in order to avoid stomach cancer. In addition, H. pylori infection can also cause acute gastritis, chronic gastritis, gastric ulcer, duodenal ulcer, and so on. Therefore, people with clear Hp infection or suspected Hp infection need to go to the hospital and cooperate with the doctor to give regular examination and treatment.