Emesis does not lead to the development of gastric cancer. Emesis is the physical or chemical stimulation of the vomiting reflex to expel stomach contents. The causes of gastric cancer are complicated, but currently, it is clinically considered to be related to the following factors: the causes of gastric cancer may be related to the long-term consumption of fumigated and pickled foods; it may also be related to the infection of Helicobacter pylori; it may be benign gastric diseases, such as gastric polyps, chronic atrophic gastritis or the residual stomach after partial gastrectomy, which may lead to the occurrence of gastric cancer; the occurrence of gastric cancer also has a certain genetic predisposition or family susceptibility. The occurrence of gastric cancer also has a certain degree of heredity, or family susceptibility. There is no clinical basis to believe that vomiting reflex can lead to the occurrence of gastric cancer, so it is not true that vomiting can lead to gastric cancer.