Hi Doctor.. Im A Female... I Recently Noticed A Small

Hi doctor.. im a female... I recently noticed a small hard bony growth on top of my head.. its as small as a pea.. or even smaller than a pea its right on top of my head towards right side. It feels it's fixed to my skull and my skin moves freely over it. Its not prominent to see..but i can feel It wen I move my finger over it...its not painful as such but im just worried of what could it be.. please help me know.