I pick my hangnails on my thumbs. My poor thumbs are deformed. I also pick the scab in my left ear. It just keeps scabbing, and the wax is driving me nuts.
I can relate to also picking scabs on my scalp - to the point of it sometimes bleeding. Sorry for the graphic. I try not to, but sometimes I can't stand it.
I grew up with acne at a very young age, and all the stigma and name-calling made me want to scrub. The worst thing ever invented was that buff puff that my parents got me to use with Neutrogena bars. I loved Neutrogena bars (they had such a pretty perfumed scent back then - today, not so much), but the buff puff that scraped my acne on my face caused permanent scarring.
I pick when I'm nervous or just uptight or just out of habit.
I don't do it all the time, but sometimes I do it without knowing.