Teen, I guess I started with acne, managed to quit that due to becoming unhealthily obsessed with... romance, or simply put, a girl. Only to relapse later into ravaging my hands. 10 years at this point (or more, if you count the acne-related stuff). I haven't given up yet, although on the dark side, I've had several periods of completely healthy hands, many years ago, and that took place in essentially anxiety-free environments, practically heavenly, which I don't think I'm ever going to experience again as a responsible adult.