Spring covers and autumn freezes, and there are no miscellaneous diseases.
Interpretation of Spring Cover: After beginning of spring, don't rush to take off your thick winter clothes and put on light spring clothes. Autumn freezing: it turns cold in autumn. Don't put on thick cotton-padded clothes too early and cover them too tightly. Miscellaneous diseases: refers to a variety of diseases other than typhoid and fever. Don't take off your cotton coat in spring, and don't wear too much when it is cold in autumn. Cover it properly or freeze it a little, so it is not easy to get various diseases.
The Yellow Emperor's Internal Classic of Health Preservation says, "Therefore, the health preservation of the wise must be suitable for cold and heat." Among the ancient health books in China, stone is considered as the highest quasi-thief. So how to adapt to the four seasons of cold and heat? The ancients advocated "cold comes before clothes"; Qiu Chuji, a famous health care expert in Yuan Dynasty, also said in On Taking Health Care that "cotton-padded clothes should be added in the autumn cold, and the thickness should be gradually increased, so you should not eat too much at one meal". Its main meaning is to let the body have a gradual adaptation process. In hot summer, you sweat a lot and lose more salt in your body. In summer, the pores of heaven and man are all open, but in autumn, the weather is cold and the pores begin to shrink. If the weather is a little cold, you should put on your clothes in a hurry, and your skin may lose its cold resistance if you don't exercise against the cold. "Photography Students Collection" pointed out: "The cotton-padded clothes in winter are a little late, but they are still getting thicker and thicker, so we can't help being warm. This is the wonderful thing. " It gets cold in autumn and then freezes for a while. Proper cool stimulation is helpful to exercise cold tolerance. After a certain period of exercise in an environment with gradually decreasing temperature, it can promote the body's material metabolism, increase heat production and improve its adaptability to low temperature. In addition, the season has just begun to change, the temperature is still unstable, and too many clothes are added too early. Once the temperature rises, you will sweat and catch a cold.