The high-risk group of tumor occurrence refers to the group of people who are more prone to cancer, and this group of people generally has the following characteristics: 1. Age above 45 years old; 2. Bad life habits, such as long-term smoking, long-term alcohol abuse, long-term staying up all night, and other bad habits; 3. Specific occupational environmental exposures, such as long-term exposure to asbestos, arsenic compounds are prone to lung cancer, long-term exposure to coal tar are prone to Skin cancer, bladder cancer for those who have long-term exposure to aniline, leukemia for those who have long-term exposure to benzene, etc.; 4. Family history of tumors, such as breast cancer and colorectal cancer with obvious genetic aggregation, etc.; 5. Long-term history of illnesses, such as hepatitis B cirrhosis for those who are susceptible to liver cancer, gastric ulcer, gastritis for those who are susceptible to gastric cancer, pulmonary cancer for those who are susceptible to pulmonary tuberculosis, and lung cancer for those who are susceptible to poor diet and eating hot food for a long period of time. people with a history of tuberculosis are prone to lung cancer, people with a history of dietary irregularities and easy to eat high temperature food are prone to esophageal cancer, and patients with a history of long-term emotional suppression or irritability are prone to breast cancer.