Can sub-health patients see it from the surface energy?

Sub-health has many definitions and belongs to the third state between health and disease. It is also said abroad that it is gray or fatigue syndrome. Personally, I think sub-health is the low physiological function of human body, which mainly refers to nerve regulation function, body fluid failure function and immune function, and it is sub-health in the process of quantitative change. This quantitative change has a cumulative process. If you accumulate more, it will easily become qualitative change. If sub-health changes qualitatively, it is called a disease state. After careful study, sub-health is a big concept, which includes several successive stages. Among them, the one closely adjacent to health can be called "mild psychosomatic disorder", which is often manifested as fatigue, insomnia, loss of appetite, emotional instability and so on. But these obstacles are easy to recover, and they are no different from healthy people after recovery. About 25% ~ 28% of the population.