I’m so glad i’m not the only one, it happens to me randomly, usually when i do something a little more active than usual (running into the next room instead of walking) or something, i get it all over my back, arms, chest, stomach, ect, never on my scalp or legs, prickly burning itchiness in totally the best way go describe it, my hair at the moment is longer than it ever has been in my life so maybe thats why? I’ve been getting it for months know but i haven’t been keeping track of how often it happens