The difference between primary prevention, secondary prevention and tertiary prevention is that the contents of prevention are not the same; primary prevention emphasizes the elimination of the causes of disease, secondary prevention emphasizes early diagnosis and early detection, and tertiary prevention is clinical treatment. Primary prevention refers to the prevention of diseases by taking measures to promote health, or eliminating disease-causing factors that are harmful to the body, so as to improve the body’s resistance. Examples include: health education, vaccination, prevention of infectious diseases, and preventive medication for high-risk individuals. Secondary prevention refers to early detection and treatment in the preclinical stage of disease. This can be done through census, screening, regular physical examination, and key programs for high-risk groups. Tertiary prevention is the timely and effective clinical treatment of patients suffering from the disease, terminating the development of the disease, preventing the deterioration of the disease, and preventing and development and disability. It is important to actively carry out primary and secondary prevention to nip the disease in the bud, and at the same time actively carry out tertiary prevention, and consult a doctor in time if you feel unwell.