Cold and hot
Fever and cold are a type of fever that alternates between fever and aversion to cold. It is self-heating when it is hot, but not cold when it is cold. Simultaneous and different from chills and fevers. "Live evidence of living people": "People who exchange cold and heat, yin and yang win together. If the yang is insufficient, then the cold first, then the heat, and the yin deficiency, then the heat first, then the cold." .
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