Head Injury?

[Fr3EK]

About 8 to 10 years ago, I was riding a moutain bike and I crashed. I woke up in the middle of the street with blurred vision, disorientation, and stood up to find that I had little balance for a moment. At the time, I was young, so I never went to get it checked out - but I'm almost positive that it was a concussion.

Anyway, I had a nasty bump and was missing a small patch of hair where my head hit the concrete. I believe the hair has since grown back (its hard to tell), but the bump STILL hasn't gone away. I'd say the area of the bump is roughly 2x1 inches and along the perimeter of the bump I can make indents in the skin.

Is it possible to have been walking around with a skull fracture. Is the bump a result of improper healing of the fracture?
Additionally, is there anyway to fix this problem now? Are there any long term health problems associated with such a head injury? I'd say I've taken at least 3 or 4 seriously hits to the head. This one being spoken of as the most serious.