Honestly the pain may be the part that causes the addiction. For me it started when I was 11. I was stressed, untreated for ADHD, and an eyelash was in the way so I just plucked it. The result was immediate relaxation. The next time I got an eyelash I just plucked it before I got stressed. Then I started plucking em when I was bored. Then puberty came and I got the same obsession with ance. That was a long one, then it went to these weird gland things in my mouth for a little bit, then it started on my beard which is by far the worst. It doesn't hurt anymore, but the moment it itches, fuck everything.
It's not an urgent anymore it's like scratching an itch. It's automatic. I can't control it undless I have gloves or wrist braces for the carpal tunnel doing this gave me.