Health means that a person is in a good physical, mental and social state. Health includes that the main organs are free from diseases, the body shape develops well and evenly, the physiological functions of various human systems are good, and the physical activity ability and labor ability are strong, which can adapt to environmental changes and the effects of various physiological stimuli on the body.
Sub-health is a critical state between health and disease, and all kinds of instruments and tests are negative, but the human body has all kinds of uncomfortable feelings. This is a new medical theory and concept, and it is also the product of social development, science and the improvement of human living standards. It is directly related to people's unhealthy lifestyle and increasing social pressure in modern society.
Disease is an extremely complicated process. Many times, from health to disease is a process from quantitative change to qualitative change.