I've picked at my scalp since 6th grade or so and I'm now in tenth.
However, I've recently developed a new form of picking, if you could call it that.
I don't know how it got started but I squeeze the skin on my upper arms (all around them) up to the front and back of my shoulders. A whiteish substance comes out after squeezing and if I don't scrape it off it will stay there. It's not puss, I think it's just the root of the hair follicle, but I didn't realize that until recently.
I'm not sure if anyone else does this but I'm having a huge problem with it. Even on 90 degree days I wear sweatshirts now. Originally I was using it as an alternative to scalp picking and it worked for a while but now I'm doing BOTH and not only is the arm thing getting worse, but my scalp is worse than ever.
Does anyone else do the squeezing/pinching with the arms to get whatever that substance is to come out? I find it so satisfying. I'd just like to find someone else that knows what I'm talking about.