Gastric cancer is one of the common gastrointestinal malignancies in China. Most of the early symptoms of gastric cancer are not typical, and most of the patients are already late when they are found, so the risk of recurrence or metastasis after surgery is high, how can gastric cancer be prevented and detected early? Here, I would like to introduce some general knowledge about gastric cancer to you. Current research suggests that the high-risk factors leading to gastric cancer are mainly Helicobacter pylori infection, high salt diet, alcoholism, smoking and family history of gastric cancer. In modern society, people live a stressful life, often stay up late, eat irregularly and have many bad habits, which often lead to stomach bloating, stomach pain, indigestion and other digestive symptoms, and most patients choose to buy some stomach medicine on their own to take. Therefore, to prevent gastric cancer, firstly, we should start from our living habits, such as no alcoholism, no smoking, low-salt and low-fat diet, regular meals and no late nights; secondly, gastric diseases are mostly related to emotions, and psychological disorders such as anxiety and depression can easily lead to spleen and stomach disorders, therefore, in daily life, we should learn to release stress and maintain physical and mental health; thirdly, if indigestion symptoms such as gastric distension and stomach pain occur repeatedly and have a tendency to last longer, or the interval between episodes is shortened, we need to promptly prevent gastric cancer. Fourth, if you have H. pylori infection, it is recommended to consult a gastroenterologist if you need H. pylori eradication treatment; Fifth, if the diagnosis of gastroscopy biopsy is atrophic gastritis or atrophic gastritis with intestinal epithelial metaplasia, you need a routine gastroscopy once a year; Finally, if there is a family history of cancer in the immediate family, such as stomach cancer, it is recommended to have regular medical checkups. Finally, if there is a history of stomach cancer and other cancers in the immediate family, it is recommended to have regular medical checkups, and gastroscopy can be routinely performed every 2-3 years.