It is reported that 70% of the world's population is in a sub-health state. Women account for a quite large proportion of the sub-healthy. Feeling fatigue and weakness, often here hurts, there itches; you go to the hospital for a check-up and all indicators are still normal - in fact, you have been categorized as "sub-healthy". Therefore, you need some simple methods to keep full control of your health status at all times.