Does human skin temperature change in winter and summer?

In addition to body temperature, people also have "skin temperature", that is, the temperature of the skin surface. When the ambient temperature is 23℃, the temperature of human forehead skin is generally 33-34℃, 30℃ for hands and 27℃ for feet.

20℃: the best room temperature and sleeping temperature. In spring and autumn, it is most comfortable to keep the room temperature around 20℃. We often say "warm as spring", which means that the average outdoor temperature in northern spring is around 20℃. At the same time, 20℃ is also the best sleeping temperature. When the room temperature is above 24℃, sleep will become shallow, and the number of body movements and waking up during sleep will increase. When the sleep temperature is lower than 18℃, it is easy to wake up and not easy to enter deep sleep. Therefore, the bedroom room temperature is generally around 20℃ and the humidity is around 60%. If it is an office, it is best to keep the temperature constant at 17℃, which is the most suitable environmental temperature for human thinking and the best learning temperature.