Stomach cancer is a poor cancer, the incidence rate is not high in developed countries in Europe and America, and the regions with higher incidence rate of stomach cancer are China, Japan and Korea. This may be related to dietary habits. Stomach pain is a very common symptom and usually does not require excessive panic. However, symptoms of stomach pain may occur in small cases such as functional dyspepsia, gastric ulcer, duodenal ulcer, and large cases such as gastric cancer and pancreatic cancer, so it is still necessary to pay attention when stomach pain occurs. Therefore, it is important to pay attention to the prevention of stomach cancer and to find ways to detect stomach cancer at an early stage. What are the high-risk groups of stomach cancer? Family history of gastric cancer, residents of areas with high incidence of gastric cancer, men over 50 years old, long-term smokers, alcohol drinkers, people who love to eat hot food, pickled and barbecued food, high-salt food and other bad habits, people with long-term atrophic gastritis with Helicobacter pylori infection, intestinal epithelial hyperplasia, gastric ulcer, gastric polyp and residual stomach are all risk factors of gastric cancer, and the more you meet them, the higher the risk is. For those who have atrophic gastritis and H. pylori infection, it is recommended to actively treat them to eliminate risk factors and ultimately reduce the possibility of gastric cancer. In addition, it is necessary to start from early detection. It may not be enough to rely on the above symptoms to determine whether there is stomach cancer or not. In early stage of stomach cancer patients, there are often no obvious symptoms or only non-specific symptoms such as upper abdominal discomfort or atypical upper abdominal pain, and it is often more passive to go for examination after the emergence of obvious symptoms intensification, so it is better to have a planned physical examination. Therefore, we are reminded that people who are at high risk of stomach cancer in their old age have the sense of prevention, know how to recognize some unusual symptoms, and pay attention to prevention and medical checkups in general.