The occurrence of gastric cancer is not accidental. Medical experts have found that the occurrence of gastric cancer is closely related to four factors. These four cancer-causing risk factors are overweight, smoking, acid reflux and eating too little fruits and vegetables, and almost 80% of stomach cancer patients are related to one or more of these factors. Besides that, stomach cancer is also very much related to many living habits, and developing good living habits will help a lot to prevent stomach cancer. Since in stomach cancer comes from life, we can also make it disappear through life. For stomach cancer, we can try to do some prevention in our life. Change the habit of swallowing too much. Eating too fast, too full or too hot is an irritation and even damage to the stomach. In addition, don’t eat one full meal and one hungry meal, it is better to fix the time of three meals roughly. To eat more fresh food. It is generally believed that eating unfresh food, pickled food, and things that are very irritating often can damage the stomach and promote the formation of stomach cancer. Too salty is also bad. Fresh vegetables and fruits, rich in various vitamins, such as vitamin C, etc. All these vitamins may protect the cells of the stomach and may also block the carcinogenic effects of some cancer-causing compounds, such as nitrosamines and the like. Vitamin A, found in foods, may also protect the cells. Carotene, which can be converted into vitamin A, is good for the body to prevent cancer. 1. Eat more foods with high protein content, like eggs, fish and meat. Many experts believe that the incidence of stomach cancer decreases if you eat more foods with high protein content. 2.Eat more foods with polysaccharides, such as fresh mushrooms, shiitake mushrooms, etc. 3.The occurrence of gastric cancer and emotional depression also have a certain relationship. According to the survey, eating under depressed mood for a long time has a certain influence on the development of stomach cancer. It is also beneficial to prevent stomach cancer by actively removing bad emotions. Smoking is a high incidence factor of stomach cancer, so quitting smoking is a good medicine to protect stomach. 5.Limit alcohol. Long-term excessive alcohol consumption will easily damage the gastric mucosa and cause erosive gastritis, which may lead to abnormal proliferation of gastric mucosal epithelial cells and eventually cancer. 6.Control weight. Excessive weight is not only a burden for stomach cancer, but also a heavy burden for hypertension, cardiovascular diseases and diabetes. Besides prevention in life, some medical means can also be applied for prevention. People with family history of stomach cancer should go to hospital for relevant examination if they have stomach discomfort symptoms. For those who have chronic atrophic gastritis with intestinal epithelial hyperplasia, in addition to active treatment, regular gastroscopy review should be emphasized, and once a year is appropriate. Patients with gastric polyps should be removed by high-frequency electricity, microwave, laser and other methods under gastroscopy as soon as possible after discovery. Patients with residual stomach should have regular checkups 10 years after gastrectomy. Patients with gastric ulcer, if the ulcer cannot be healed after regular treatment, should be surgically removed to avoid cancer. Prevention and treatment of H. pylori infection is an important measure to prevent gastric cancer, so there should be targeted medication to eradicate H. pylori in time.