The so-called sub-health can be understood as an overdraft state of health, which is in the middle state between health and disease, and develops or excesses from health to disease, that is, the body does have various discomforts but no substantive lesions.
Disease refers to the process of injury and anti-injury caused by the interaction between etiology and organism under certain conditions. There are a series of functions, metabolism, morphology and changes in the body. There are different symptoms and signs in clinic, which hinders the coordination between the body and the external environment. Every disease has: 1, which means that there is a disease, that is, the cause. 2. Changes in body function, metabolism and morphological structure. 3. The steady state of the body is out of order. 4. Have specific symptoms, signs or abnormal social behaviors.