How Can I Remove This Bump on my Head? (photo)

I have a bump on the middle of my forehead which I got when I was pushed off my bike as a child landing on a concrete floor head first, it's shaped like an egg and I've had it now for 20+ years now, it's causing me major depression I know it's not just BDD because I notice people staring all the time it's really crushing my confidence and I just want it dealt with. I really need all advice I can get, what cost? Is it free on the NHS? it looks majorly worse in other lights