I'm like that with dry looking skin. Doesn't matter what it is - chapped lips, a healing wound, a dried blister...I need it off my skin. I've got several scars from where I just wouldn't let a wound heal coz I picked the scab off it and I know I shouldn't but I just can't help myself. I have scars on my face from where I've picked spots. My lower lip is now naturally about 3 or 4x the size of my upper lips because I picked at the edges of it so frequently. I'm thinking about therapy, because at some point I'm gonna do damage I can't ignore...
Re: triggers for some kind of self mutilation, maybe dermatillomania