Prevention before illness is the preventive thought of traditional Chinese medicine, including prevention before illness, prevention after illness, and prevention of gradual change. This requires people not only to cure diseases, but also to prevent diseases, to pay attention to the trend of disease prevention, and to think of emergency measures that can be taken before the disease occurs, so as to grasp the initiative of the disease and achieve the "work skills" of "perfect treatment".
One of the guiding ideology of preventing diseases is to intervene in time when the human body enters the sub-health state, strengthen the body's health, adjust the balance of yin and yang through acupuncture, scraping, decocting and diet therapy, and restore the dynamic balance of the human body. Adjustment at this stage is often more effective than treatment after illness.