Give your hands something else to do, stay on top of your skincare so there's less to pick at, and slap a pimple patch over anything you're tempted to pick at so you're not making it worse. Easier said than done, I know, but its helped me break the habit. I've been using a fidget spinner ring from Amazon to keep my hands busy, but there's a lot of things out there to try.
Both my sister and I use this ring from Amazon. Additionally, have you tried NAC (N-AcetelCysteine)? Ever since I started taking that, my urges have gotten way better. Like for the first time in Lord knows how long - I actually have full eyelashes.
If you want something hair related - I think a headband would be nice. Helps to make our hair feel pretty and can help her notice urges if she touches it or something. One thing I love is this fidget ring from amazon. I got it and loved it (it is currently lost somewhere ugh), and I got it for my sister who struggles with skin picking/dermatillomania, and she loves it too.
I leg bounce incessantly, but I don't recommend it. My muscle tone is superb, but some days it fucking hurts.
Fidget spinners help. This fidget ring seems delightfully subtle. I've been wanting to try the fidgipod, also, as you can put it on or under your desk.