As the pace of life accelerates, the pressure people feel increases and more and more people are in a state of subhealth. As a result, more and more people are concerned about subhealth: What is subhealth? What should we do when we enter a state of sub-health? Subhealth is a state of low quality and psychological imbalance with no clinical symptoms or signs, or a feeling of illness without clinical evidence, but with potential morbidity. Generally speaking, the state of subhealth consists of four major elements: a state of fatigue and weakness excluding disease, an intermediate or pre-disease state between health and disease, a state of physical, psychological, social adaptability and moral imperfection, and a state of decline in tissue structure and physiological function not commensurate with age. In detail, subhealth is a big concept that contains several stages that are connected back and forth: among them, the one immediately adjacent to health can be called “mild psychosomatic disorder”, which is often characterized by fatigue, insomnia, poor appetite, emotional instability, etc. However, these disorders can be easily recovered and are no different from those of healthy people. It accounts for about 25% to 28% of the population. If this disorder continues to develop, it can enter the “latent clinical” state, at which time, it has shown a high risk of developing into some diseases, and the high possibility of developing into a disease is latent. More than 1/3 of the population is in this state, and the proportion increases steeply in people over 40 years of age. They can present with chronic fatigue or persistent psychosomatic disorders, including the aforementioned symptoms lasting more than 2 months, and are often accompanied by chronic sore throat, recurrent colds, and lack of energy. Some experts also categorize the manifestations of the disorder into 3 types of decompensation: diminished vitality, diminished responsiveness, and diminished adaptability. From clinical tests, such groups in the city are more concentrated in the three high and one low tendency, i.e. the presence of near critical levels of high blood lipids, high blood sugar, high blood viscosity and low immune function. There are at least 10% of people between latent clinical and disease, which can be called “pre-clinical” state, meaning that there are already lesions, but the symptoms are not obvious or have not been given enough attention, or they have not sought a diagnosis, or even if the doctor has made a test, it has not been detected for a while. Strictly speaking, the last category does not belong to subhealth, but to the unhealthy state of disease, only to be clearly diagnosed. Therefore, excluding this group of people, there are many researchers who believe that the subhealthy people account for about 60% of the population. Studies at home and abroad show that those who meet the health standards in modern society only account for about 15% of the total population. Interestingly, 15% of the population has been diagnosed with a disease and is in an unhealthy state. If we consider health and disease as the two ends of the life process, then it is like an olive with two pointed ends and a large piece protruding in the middle, which is the transitional state between health and disease – sub-health.