Been having for a while, and now it's constant when I'm hot, a pricking sensation on my face, like the feeling before a blush, or as if there is cold water on the side of my face. Whenever I google it I get all sorts of things I don't like the sound of. I've just started healthy eating and exercise (my answer to everything). Anyone had this and did it go away? I'm 40, not sure if it's an age thing.