Infection with H. pylori may be reinfected after it is cured, but the chances are low. The main reasons for re-infection are bad habits and low immunity. 1. Bad living habits: H. pylori is contagious, mainly through oral and fecal-oral transmission, and there is a phenomenon of family gathering. It is easy to be infected with H. pylori if you don’t pay attention to the hygiene of your food, share dishes with others, or eat unclean food. After the patient is cured, he can be infected by family members again. 2. Low immunity: Helicobacter pylori is susceptible to all people, and patients with bad lifestyle habits usually smoke and drink heavily, resulting in poor resistance and low immunity, which makes it easy to be infected with Helicobacter pylori again. Infection of H. pylori may be re-infected after cure, H. pylori infected dishes should be separated from family members, timely disinfection, usually eating attention to hygiene, avoid eating unclean food or water. If you feel unwell, it is recommended that you consult a doctor in time to avoid delaying your condition.