I haev uncontrollable nervous spasms sometimes - probably Gille de la Tourette, though I've never been diagnozed. Anyway, most of the time I can limit it to twitching my lip or nose, stretching my arms in a bit of a weird way, whatever, and sort-of cover it. Sometimes it decides it's time to have my abdomen/midriff twitching and jerking, which is way more annoying, can't properly be hidden, and is a bloody nuisance when sitting at a desk or driving a car.
Now, my body has decided that having an involuntary muscle spasm is just what I needed in my lower left hip/pelvis. Where I'm already suffering from a hernia. Every twitch has me screaming in pain and pulling away. Seriously, if this doesn't let up...Well, I dunno - I know painkillers can't completely numb this, and even complete immobilization doesn't stop the spasms, only medical paralysation - but if I take enoguh paralytics to stop this I can't walk around anymore, so....Yeah. That sucks.