Health checkup is an effective means to prevent cancer. Through effective, scientific and regular health checkups, some subhealth states can be found, and some “precancerous lesions” can also be found, which are meaningful for tumor prevention in various parts. For example, benign lesions in the lung can be prevented from developing into cancer if they are followed up and dealt with scientifically and early; there are also precancerous lesions in the digestive system, which can be effectively prevented from stomach and intestinal cancers if they are dealt with properly and in time. More and more research evidence shows that precancerous lesions, if not effectively controlled and treated, can eventually become cancer. Pay attention to annual health check-ups, especially to lock what is unhealthy, what is subhealthy and what is precancerous based on the results of health check-ups, and deal with them scientifically under the guidance of doctors. If you are a smoker, smoking more than 20 cigarettes a day and smoking for more than 20 years, you must take a front and side chest X-ray once a year. If you are a heavy smoker, I suggest you to have a low-dose spiral CT of the chest. in recent years, the death rate of esophageal cancer in our country has decreased precisely because the country has invested a lot of efforts to establish bases for early diagnosis and treatment of esophageal cancer in areas with high incidence of esophageal cancer in Henan and Hebei, to detect lesions at an early stage and deal with precancerous lesions in time. We hope that people with bad habits will give a little more attention and investment to your health and pay attention to scientific and regular health checkups when you reach middle and old age.