Helicobacter pylori is contagious and spreads mainly through the digestive tract route, and its invasion of the human body can cause chronic gastritis and other diseases. H. pylori is mainly transmitted through the digestive tract, i.e. fecal-oral or oral-oral route. Common examples are unclean diet and sharing of utensils, etc., which are infectious to a certain extent. H. pylori enters the stomach through the mouth, and is partly inactivated by gastric acid, and partly relies on its flagellum to pass through the mucus layer of the stomach and settle in the stomach. Long-term chronic infection of H. pylori can promote the occurrence of gastric diseases, such as chronic gastritis, peptic ulcer, gastric cancer and so on. In your daily life, you should pay attention to dietary hygiene and use communal chopsticks. If you feel unwell, it is recommended that you seek medical attention in time for diagnosis and treatment.