H. pylori is a spiral-shaped, slightly anaerobic bacterium that requires very demanding conditions for growth and resides mainly in the stomach or duodenum of humans, and also in the mouth of some infected individuals. H. pylori infection is contagious and may be transmitted to children. H. pylori is highly contagious and can be transmitted through hands, unclean food, unclean utensils, and feces, but parents need not worry about this because complete eradication of H. pylori is not difficult, and 90% of bacterial infections are often eliminated from the body after 1 to 2 weeks of treatment. In order to avoid cross-contamination to young children or children, it is important to eliminate some bad habits such as mouth-to-mouth feeding, mouth-to-mouth kissing and the practice of blowing cold food with the mouth, which is also undesirable, and avoiding these behaviors can effectively avoid cross-contamination of H. pylori. If there are H. pylori carriers in the family, family members should develop good hygiene habits, wash their hands regularly, before and after meals; if you can share meals the best, if not, you need to use separate utensils. For H. pylori infected people, the dishes can be disinfected regularly by steaming at 100°C for thirty minutes, which is enough to kill all the H. pylori. For those who are suspected to be infected, they should go to the hospital for examination and diagnosis, and then a professional doctor will decide whether medication is needed.