I’ve had it since like 5 years old. It’s definitely an anxiety related habit so anything to help lower stress and anxiety helps a lot. I found it was much easier to redirect my hands or compulsions like rather than pulling out important hairs, I pull out leg hair. Rather than picking at my skin, I watched pimple plucking videos. Also picking up a skill like knitting or drawing (even if you are horrible at it) can be helpful to keep your hands busy