As many people know, winter is the season of tonifying kidney. So, what is the key to tonifying kidney in winter? According to TCM health experts, the key to tonifying the kidney in winter is "not disturbing the yang". To put it bluntly, don't let anyone or anything disturb your sleep. Huangdi Neijing. Su Wen "Four Qi Tiaoling" said: "In winter and March, this is called closing Tibet, freezing water and ice, and not disturbing the sun. "The purpose of storing Yang in winter and March is to store Yang, that is, to store Yang, and there is enough Yang to supply life in spring, so it is not allowed to disturb or interfere with Tibetan Yang. In the small weeks during the day, when the yang is hidden at night, the yang of the human body should be accumulated and supplemented through sleep. How would you feel if someone always bothered you when you were sleeping late at night? You will feel particularly uncomfortable and will be listless the next day. This is the result of Yang Can not being hidden. In the long run, your body will collapse. If you dig out the roots and expose them to the ground, the yang will be gone, life will die, and trees will not sprout and grow in the spring next year. This is why there is no disturbance to the sun. Neijing also said: "Winter typhoid fever is bound to be warm in spring", which means that if the yang is not well protected in winter and is injured by cold pathogens, it is easy to get fever in the spring of next year, which is what western medicine now calls infectious diseases.