For at least the last few years, I have had a patch of skin on my back (on/near my left scapula) that occasionally feels tingly and cool. It is about the size of a nickel but doesn't look any different from the rest of my back. It usually lasts for several minutes and it occurs at least once every other day. I've tried massaging it but I can't make it go away. I'm not as worried about it as I am annoyed and confused by it. Does anyone know what it could possibly be? Thanks!