Does anyone know how to stop dermatillomania?

Hey guys I have undiagnosed dermatillomania and it's starting to drive me insane, I can't do anything without picking at my skin, majority of the time it's on the heels of my feet or around my cuticles of my fingers and thumbs. Ive been doing this for about 4-5 years now and it's really starting to get on my nerves, aswell as my boyfriend's, whenever were watching tv or something he would tell me to stop and if I don't he will pull my hands away from wherever I'm picking which will cause me to shake slightly... It's really annoying but no matter how hard I try I cannot stop picking even if I try cause when I think I've stopped I'm still doing it subconciously