I have cold hands almost all the time, even in the summer?

I’m 15 and female. Previously I have had alopecia Areata and eczema. I have cold hands almost all the time, even in the summer. They don’t really change in colour, just go a bit patchy and pale. When I hand something to someone they feel my hand and say how freezing my hands are which causes embarrassment. My skin is generally really pale anyway. I also lack concentration and coordination.
What could this be?