Disease prevention includes three meanings. The first layer means that when the human body is healthy and disease-free, it is necessary to strengthen health care, pay attention to avoiding the invasion of sick gas in time, and actively prevent the occurrence of diseases, which is the highest state of disease prevention; The second meaning means that when the human body is about to have a disease, similar to the sub-health state in modern times, it is necessary to foresee the disease as soon as possible and take effective measures to prevent it; The third layer means that the disease has occurred, so we should pay special attention to detect the development trend of the disease in advance and take effective measures to prevent the further development of the disease as soon as possible. At this time, the prevention of disease mainly refers to "getting sick first in the place where it is not sick" to prevent the illness from getting worse. At the same time, measures should be taken to promote the early recovery of the disease and restore the body to the state where it is not sick as much as possible. From this point of view, the prevention of diseases seems simple, but it contains rich ideas and theories of TCM prevention, health care and rehabilitation, and it still has its glory. Under the guidance of this concept, people in China integrate the idea of disease prevention into their daily life, such as drinking Tu Su wine on the first day of the first month to prevent plague, taking ointment to supplement their health in winter to day, and moxibustion at Zusanli in winter to day to enhance their health.