People with high risk factors for gastric cancer need to undergo gastroscopy screening. People with risk factors for gastric cancer: First, people with precancerous lesions of the stomach. Such as patients with chronic atrophic gastritis, gastric mucosal intestinal hyperplasia and atypical hyperplasia, gastric ulcer, and residual stomach with part of the stomach removed for various reasons, these people have a higher probability of gastric cancer than normal people. Secondly, people who are infected with H. pylori. H. pylori infection can increase the risk of gastric cancer by two times, but not all people with H. pylori infection will develop gastric cancer. In fact, approximately 2 billion people worldwide are infected with H. pylori, but only 1% eventually develop gastric cancer. In addition, chronic EBV infection is also associated with the development of gastric cancer. Third, people with genetic factors of stomach cancer. People with family history of gastric cancer or tumor are more likely to develop gastric cancer, and the incidence of gastric cancer increases with age. Fourthly, people with poor living and eating habits. High-salt diet and smoked, fried and fried foods not only directly damage the gastric mucosa, but also contain a lot of nitrates and other carcinogens, which can increase the occurrence of gastric cancer. Meanwhile, smoking and alcohol consumption have been shown to be closely related to high risk of stomach cancer. In addition, poor dietary habits can also cause chronic damage to the gastric mucosa and even secondary carcinogenesis. Bad eating habits mainly include: skipping breakfast, irregular diet, fast eating, preferring extra hot food, overeating, eating leftovers and moldy or expired food, etc.