Talk to Dermatologist on Small Hard Lump Over Scalp

I have a small lump over my scalp near the forehead since a few years now. Its not painful to the touch, not soft, its the same color as my scalp so not noticeable except when i touch it with a finger its prominent. Its only painful if i press it down too hard but pain is very dull. Its about maybe 1-2cm in diameter. It hasnt grown or reduced over the years. Its just there, doesnt move around either. What could it be and should i be concerned? Ive had no issues over these past few years because i thought it'd eventually shrink and disappear but hasnt