I don't know what that's called but I get that too. Especially when I'm really tired. Most of my pain is in my hips, hands, feet, ankles, back and neck. But I have had that same sensation.
I have another question that's along the same lines... Do you get these weird deep tingly/itchy spots that are usually in the same place.. but for no reason, no rash, dry skin, sort of like an itchy twitch? LOL itchy twitchy??
Maybe there's somekind of nerve thing?!?!
Thanx & hugs,