Everyone is warm, I'm cold. Everyone's skin is warm, my skin is cold. Poor blood circulation? Slow metabolism? What spell will fix me?

I had the same thing. I found that the reason lies in muscle clamps (blocks). Rarely people are aware of their presence and action, but they are a subconscious defense against psychologically traumatic situations.

In psychotherapy there is a method called "body-oriented therapy" or "bodynamics". I would recommend that you consult a specialist in this field.