Kissing does not transmit 100% of H. pylori, but there is a possibility of H. pylori infection, and those infected should be treated promptly. Infection with H. pylori will increase the risk of chronic gastritis, gastric ulcer, and even gastric cancer, so H. pylori infection should be prevented. At present, it is believed that H. pylori infection is mainly transmitted by mouth and fecal-oral transmission. 1. Oral transmission: living with H. pylori infected people often can increase the risk of being infected by contacting the saliva, vomit and other secretions and excretions of infected people (including kissing), but it is not 100% infected. 2. Fecal-oral transmission: In areas with poor sanitation, the probability of dietary contamination by H. pylori increases, and persons in the area are more likely to be infected with H. pylori; in addition, people who often eat out and do not use communal chopsticks also put H. pylori at an increased risk of infection. Considering the dangers of H. pylori infection, it is recommended that infected persons should seek timely treatment in hospitals.