Okay so I'm 15 years old, and I have been picking at my scalp for about 3-4 years now. I have picked at my skin till it bled, I have scabs on my scalp that I pick at so they never heal properly. I started picking at my scalp when I first saw that I had lice (I had lice quite a bit when I was younger) , so I would run my fingers through my hair over and over, but now, I don't have lice anymore but I still pick at my scalp thinking that there's something there. It has gotten to the point were I can't go 45 minutes without picking at my scalp. What should I do?