With the gradual improvement of living standards, everyone pays great attention to their health, whether in daily life or in their own health. For some office workers, due to possible work reasons, they will have a physical examination every year. However, in some counties or towns, the popularization or publicity of many diseases may be less, and people's understanding of some risk factors and hazards of diseases is not enough. Some old people with feudal ideas will think that some coughs, expectorations or stomachaches are minor ailments and pains, which have not attracted attention. However, after these symptoms were relieved, they did not go to the hospital for definite examination and treatment.

Many serious diseases occur because of indifference to these clinical manifestations in the early stage. After many clinical symptoms disappear, it is possible that he only disappears briefly, and then more serious clinical manifestations or diseases may appear. Because our body has a defense mechanism and a repair mechanism, when there are some problems, the body will have a compensation function accordingly. Then at this time, it is possible that the symptoms will disappear, and when helping our body to repair these existing problems, it will show a state of decompensation. At this time, the clinical manifestations will be obvious, which also confirms the severity of the disease.

It is reported in the news that a 22-year-old female college student was diagnosed with lung cancer. There may be many questions in this report, such as why she got cancer at such a young age and whether it was misdiagnosed. When these problems appeared in my mind, it also proved that everyone's understanding of the disease was limited. It is not that malignant tumors only occur in the elderly or patients with more basic diseases.

It is not that malignant tumors will not occur at a young age. These potential clinical manifestations may make the severity of the disease close to incurable. For example, cancer, so, whether for young people or the elderly, the annual health check-up is still very necessary. Many early cancers are asymptomatic and can only be known through physical examination and some imaging examinations.