I don't have it severe, but enough for my doctor to notice. What he caught me doing was blink my eyes in repetitive sucession, usually to the tune of william tell (wtf). What happens with me is these little manisfestations that change every now and then. The first one I recall was the the blinking, then it turned into cracking my neck in an odd number of times, and then it was scratching random objects. Currently, it's rubbing my head. It's weird, it feels like there are a bunch of dead skin "balls" that bother me to no end. It reminds me of that neutrogena commercial where they show you the blackhead It's actually just light dandruff, but...there's no explanation, must. get. it. out! If you've ever read an isaac asimov book, and read to the descriptions of a "rising potential", that's how it feels. It's like this crawling annoyance that spreads through your body, you want to rip it apart and make it go away, but then you remember that it's not real, and your acting weird again. But your pissed anyways. To make the urges go away, I scratch stuff, but this chronic scratching has turned into a new manisfestation, and now my head hurts.
I'm screwed up, in many, many ways. Yep.