(((( saru ))))
Have you ever read anything on Impulse Control Disorders like Trichotillomania (pulling hair) or Dermatillomania? (skin picking)
You might find some helpful websites with more info if you Google them.
Therapists can help you with this.
http://en.wikipedia.org/wiki/Trichotillomania
http://en.wikipedia.org/wiki/Dermatillomania