I have a small smooth but hard bump on my scalp that wont go away. Never had b4. when I try to pop it just bleeds. No pus at all. Shud I be scared?

C/w scar tissue or. possibly a persistent sebaceous cyst with significant scar tissue around it which your efforts are not emptying, just adding to trauma & more scar tissue. Best leave alone in hopes scar tissue will decrease some over time or have excised by someone with good plastic surgery seamstress skills to reclose with minimal new scar tissue induction.