1. Primary prevention is to eliminate or reduce factors that may cause cancer and prevent the occurrence of cancer. About 80% of cancers are related to the environment and living habits. Improving living habits, such as quitting smoking, limiting alcohol, diversifying food, eating less pickled food, controlling weight, exercising properly, paying attention to environmental protection, identifying carcinogens and promoters in the environment, and strengthening occupational protection, are all important anti-cancer measures. In recent years, both immune prevention and chemoprevention belong to primary prevention, such as large-scale vaccination of hepatitis B vaccine and chemoprevention of colorectal adenoma by selective cyclooxygenase -2(COX-2) inhibitor.

2. Secondary prevention refers to how to find and treat cancer at an early stage once it occurs. Including: ① understanding and paying attention to cancer risk signals (such as persistent dyspepsia, postmenopausal vaginal bleeding, changes in defecation habits, chronic ulcers, etc.). ); ② Regularly check high-risk areas and high-risk groups; ③ Find precancerous lesions and treat them in time; ④ Strengthen the monitoring of susceptible population; ⑤ Tumor self-examination (self-examination of exposed parts of the body regularly).

3. Three-level prevention is rehabilitation after treatment, which can prevent the disease from getting worse, improve the quality of life, relieve pain and prolong life.

Now cancer and various diseases are becoming younger and more popular at an alarming rate. There are more and more people around us, who get off the bus and leave early in the journey of life before flower of life is in full bloom. Countless tragedies tell us that the greatest wealth in life is good health. Once health is gone, it is futile to have more. Caring for your body is not only the best explanation for yourself, but also the greatest responsibility for your family. Regular physical examination can stifle your potential illness in the early stage, which is the most important guarantee for your health.