Hi This May Sound Weird But I Am A Normal

Hi this may sound weird but I am a normal 55yr old lady who always pulled my hair a little. Now with all my stress I notice me doing it more and i also started to prick my scalp with a sharp hat pin. I hear a clicking noise and for some reason it feels good. I am afraid of causing a brain tumor or something else. I notice my scalp having a weird feeling but I don't know how to stop. I am like a closet scalp pricker. I looked up on line and can't find anyone who does this.
Thanksmary