People usually say that computers are in a "sub-health" state. What does sub-health mean?

According to the medical profession, sub-health is "a state of low physiological function between health and disease". In fact, it is what we often call "chronic fatigue syndrome". Because of its complex and diverse manifestations, there are no specific standardized diagnostic parameters in the world.

Sub-health means that although there is no disease in the human body, harmful factors or harmful factors already exist in the body or organs. These harmful factors or harmful factors are like time bombs lurking in the human body, which may explode at any time. Or cancer lurking in the body, slowly invading the body, if not removed in time, will lead to illness.