Helicobacter pylori infection mainly enters the body through the mouth, and the Helicobacter pylori cannot be killed by the body after entering the body, resulting in the massive growth and reproduction of Helicobacter pylori. Although gastric acid has a certain bactericidal effect under normal circumstances, Helicobacter pylori colonizes the mucus layer and the surface of the epithelial cells of the gastric antral mucosa after entering the body, which can avoid the bactericidal effect of gastric acid and is difficult to be cleared by the body's immune function. 

At the same time, the urease produced by Helicobacter pylori can decompose urea, forming a local micro-environment that is conducive to the settlement and reproduction of Helicobacter pylori, allowing Helicobacter pylori to survive for a long time. Helicobacter pylori enters the body through mouth, wash your hands before meals in daily life, pay attention to food and tableware clean, do not eat raw food, try to eat cooked food.