What should I do if my body is cold and hot in winter?

The cold and hot body in winter is actually a reaction of the body to the external environment, or the influence of changes in the external environment on the body. If the outside is warm, the body will be warm, if it is cold, the body will be cold, but when the outside temperature reaches a critical point, the body will turn on its defense function, and then the body will become hot. I hope it will help you and be adopted. Thank you.