It may be the meds or it may be ADHD. A ton of people with ADHD are pickers/pullers. There’s a boy who used to constantly pick any scab bloody as a toddler. My mother picks her skin. My husband is a beard-hair-puller who used to also mess up his skin. None were on meds then! None of my kids do, and I don’t. It drives me crazy to see people doing it, so if they ever started, I’d have batted at their hands like I do my husband! “Stop doing that to yourself!” His skin isn’t messed up from it now because he does it so much less!