I kind of get a bit of restless leg syndrome , not real bad though - a glass of wine works for me to relax the sensations.

I get a similar thing in my shoulders when they get tight- like I need to keep moving & rotating them. Which is probably a good thing , makes me more aware of how my posture is too.

I kind of wonder if it is blood flow & lack of movement related??
could be a nerve thing too from your creepy crawly description.

I don't get that feeling , just that I need to move my legs when I get the RLS stuff. {I usually get it when I haven't been active enough...}