Especially women are in the majority. People of this age group are faced with social activities such as college entrance examination, business entertainment, enterprise management, interpersonal communication and job competition, and have been under fierce environmental pressure for a long time. If they can't adjust and protect themselves scientifically, they will easily enter the sub-health state. Methods to judge sub-health: Sub-health has no clear medical indicators to diagnose, so it is easy to be ignored by people. Generally speaking, if you don't have any obvious symptoms, but you are in one or more of the following states for a long time, pay attention to sub-health and have warned you: insomnia, fatigue, loss of appetite, fatigue, palpitation, poor resistance, irritability, frequent colds or oral ulcers, constipation, etc. People who are in a state of intense work and study should pay special attention to these symptoms.