Re: Hair plucking
I have OCD and I do this too. It's not exactly trichtollomania -- the dr's don't know what to call it but it is OCD related. Same thing with your picking scabs -- sounds like you're a "leveller", everything has to feel as smooth as possible.
If these are your only 2 "habits" and there's no other signs or symptoms of anxiety, you'd be better off simply trying your best to stop this behavior rather than taking pills. However if you find yourself doing these things more frequently or if they are troublesome, then perhaps you should see your doctor.
Put some ointment (polysporin type) in your nose on the scab and keep it as moist as possible, whenever you can. I know this is hard (I had one on my leg once for nearly a year cuz I wouldn't let it heal) but it WILL heal if you leave it alone. As for the hair plucking -- I still do this sometimes but am not bothered by it.