i grew up picking at every single thing on my skin, especially mosquito bites, until they bled and bled and scarred. i have scars (pretty much all faded now) all over my body from doing this. i really freaked my parents out with it, and when i was around 10 or so my mom took me to a hypnotist to see if that would help. it sort of fixed that, but i started picking my cuticles and have been doing that ever since. my nails are a mess, but i'm not so bad about my skin anymore. i do it to my face too, but since i realise that people see that, it's easier not to make it ugly.
anyway, that's my long and rambling story about just one aspect of my OCD, i don't know what advice to give you because my impractical help didn't really help. you could take up knitting, which i've also done, or wear gloves at night, which i've also done, or start picking your cuticles, which is harmless in comparison.
wow, i really sound like a freak...but i'm not, and neither are you, and i'm really glad that someone else has had this problem because i really thought it was just me!
good luck though...i really hope something works out for you!