Cherry,
I have had this frustrating problem since I was very little. In one family picture where I was looking up at my grandmother when I was about four years old, I can see a little bald patch on the crown of my head where I would pull my hair...and my mother confirmed that I did pull on my hair at that age.
Now 28 years old, I still pull my hair. I have read books and tried different things, but I still do it on occasion. It's the most irritating and embarrasing behavior that I still am unable to completely stop doing for the life of me

. Friends and coworkers that I have had over the years have noticed it, starting from when I was in late elementary/junior high school, though I have never told a single one what I do and what it's called. I have tried to cover it up, and I still have successfully managed to hide it, but it can be challenging sometimes. Fortunately, some of my other OCD-like behaviors have subsided over the years, so I'm happy about that, as I have learned to relax a lot more, so I think this has just happened naturally to some degree.
One book that I might recommend is
Brain Lock. I don't remember the author's name, but I really enjoyed this book. There are also many others out there that are very good.
Have a great day and keep posting

.
~Colleen