Autumn is a cold season, and it is in the transitional stage of "Yang disappears and Yin grows". From beginning of autumn to long summer, summer means retreat. In autumn, the sun is like fire, the temperature is high, and sometimes it is rainy and humid. After the Millennium, there is little rain, dry weather, hot day and bright night, and the climate is hot and cold, which is easy to catch a cold and many old diseases are easy to recur. The physiological activities of the human body are adapted to the changes of the natural environment, and the yin and yang in the body also change accordingly.

I wonder if everyone is satisfied with the hat's answer. Hats know a thing or two about TCM health preservation. Feel free to ask me if you have any questions ~