It is possible for H. pylori to become re-infected, but it varies from person to person. Patients with H. pylori infection are treated with standardized medication, and if they are retested, it is suggested that they have been cured, and most of them will not be re-infected, and some of them may not be re-infected for the rest of their lives. Some people have lower resistance, do not pay attention to the dietary rules after treatment, eat greasy, smoked, spicy food, often eat with H. pylori infected people, there is a possibility of H. pylori infection from others. Therefore, after the eradication of H. pylori infection with medication, it is necessary to pay attention to personal dietary hygiene in daily life, do not share meals with H. pylori infected patients to share tableware, share household items, etc., to prevent repeated infections.