Regular physical examination is an effective means to ensure health. Some people who thought they were healthy were found to have kidney failure when they were sick; Some people who think they are not sick are diagnosed with cirrhosis; It has been found that some patients with hepatitis B have high transaminase and are in the infectious period, so they need to be hospitalized and isolated ... There are many other examples. If you can do regular physical examination, you can find potential pathogenic factors, early lesions or abnormal functions as soon as possible, so as to achieve the purpose of early detection and early treatment. Physical examination is a new self-care way, which can change passive medical treatment into active examination and passive treatment into active prevention. Medical experts believe that seemingly healthy people should also have a physical examination once or at least twice a year, because regular physical examination can find some painless or inconspicuous diseases at an early stage. From the medical point of view, the occurrence of diseases can be divided into five stages: (1) susceptibility stage: at this time, the disease has not yet occurred, but the risk factors already exist; Such as overweight, obesity, smoking, alcoholism, hypertension and so on. (2) Pre-clinical stage: At this time, the disease factors have changed in a certain part of the human body, but there are no symptoms in appearance and daily life. (3) Clinical stage: At this time, symptoms of the disease gradually appear. (4) Disability period: the late stage of the disease. (5) Death: the destruction of function affects physiological metabolism, leading to the decline of important organs of the body and leading to death. Under normal circumstances, a person will wait until the symptoms of the disease have appeared before thinking of seeing a doctor. In fact, the disease had reached the clinical stage at that time. But if most chronic diseases are found before the clinical stage, they should be treated as soon as possible. The treatment effect will be much better than that after the symptoms appear, and the chances of recovery will be higher. If the disease is not discovered until the clinical stage, the time and energy spent are relatively increased and the cure rate is low. Therefore, the purpose of our health examination is to achieve early detection and early treatment through early examination when the potential human body has no symptoms. Only in this way can we increase the medical effect, reduce the further deterioration of the disease and ensure the health of the body. In a word, the purpose of health examination can be summarized as follows: (1) Early detection of potential pathogenic factors and timely and effective treatment. (2) Observe various functional reactions of the body and adjust and improve them in time. (3) Strengthen the understanding of one's own body function, change bad living habits, avoid the occurrence of risk factors and improve the health level. When we say "regular", it should be regular physical examination, and the length of time can be different according to different situations. Young people can have a physical examination once a year, and it is best for middle-aged and elderly people to have a physical examination once every six months. Of course, regular physical examination will vary from person to person, depending on the items to be checked and tracked. Another advantage of regular physical examination is that you can establish your own "reference value" as a reference for inferring your physical health, and you can learn more from the changes in measured values. Therefore, regular physical examination every year is essential.