Fear of cold in winter and fear of heat in summer can be seen in yin deficiency, can also be seen in yang deficiency, can also be seen in yin and yang deficiency, should be combined with the relevant symptoms to determine the synthesis. It is commonly believed that the fear of heat in yin deficiency and the fear of cold in yang deficiency are due to internal heat in yin deficiency and internal cold in yang deficiency. Fear of heat in yin deficiency and fear of cold in yang deficiency can also change with the seasons, such as excessive cold in winter can also be seen in yin deficiency fear of cold, hot summer can also appear in yang deficiency fear of heat performance, yin and yang deficiency can also be seen in winter fear of cold and fear of heat in summer. Whether the fear of cold in winter and fear of heat in summer is a deficiency of yin or yang should be analyzed in conjunction with related symptoms. Yin deficiency can be seen in night sweats (abnormal sweating after going to sleep, waking up sweating stops), red tongue with little moss and other symptoms, yang deficiency can be seen in spontaneous sweating (involuntary sweating during the day, a little sweat aggravated by the movement), tongue pale fat, urine clear long and other symptoms. It is recommended to consult a professional Chinese medicine practitioner to guide the treatment after the identification of discomfort, and not to blindly use medication on your own.