Lip Picking

I have been picking at (peeling) the skin on my lips since I was a little girl. I'm now a 30 year old mom and I still pick. If my lips are dry I peel the dry skin off. If they are moist with chapstick then I pick the healthy skin off. I will pick and peel until they bleed. I tried to get artificial nails so that its harder to pick, but I just figure out how to work around them. I love to peel sunburns, chipped paint and pop pimples too. What is wrong with me?