I. High risk factors of gastric cancer The main risk factors of gastric cancer are: 1. Long-term consumption of high-salt, smoked products and salt-pickled foods has a role in promoting the occurrence and development of gastric cancer. Yu Yingjian, Department of General Surgery, The First Hospital of Shijiazhuang City has bad eating habits, such as eating fast, loving hot and scalding food and not eating three meals a day on time, etc. 2. Those who suffer from atrophic gastritis, gastric ulcer, gastric polyp, intestinal chemosis, pernicious anemia and residual stomach after most of gastrectomy have the risk of cancer. 3.People with family history of gastric cancer. Those who are above 40 years old and have long-standing gastric disease, and those who have A blood type combined with the above factors are more likely to develop gastric cancer. Early warning signs of gastric cancer 1.Supra-abdominal fullness and discomfort, hidden pain or change of pain pattern. 2.Panic acid, belching, loss of appetite, nausea, burning in the stomach and epigastric region, diarrhea and black stool. 3.Unexplained weight loss and significant wasting. 4.A person over 40 years old with no past history of stomach pain or gastric disease who develops stomach symptoms for a short period of time. Those who have recovered well from benign diseases of the stomach many years ago and have had most of the stomach removed, and have recently experienced indigestion, epigastric pain, nausea, vomiting, black stools, and markedly reduced health status. Although these symptoms do not mean that you have stomach cancer, you should go to the hospital for a detailed examination when the above symptoms do not subside.