nervous picking..?

This sounds really weird but I'm wondering if other people have this issue or know what it is and how to deal with it. 
I don't know why but I always pick. Sometimes I'm not even nervous. But it's not just with acne I'll pick at the stubble on my legs, pubic hair, and my eyebrows. 
Thanks for any help and advice. Just not sure about how to deal with it. I try to stop myself but I never realize when I'm doing it.