Manwar, if you are looking for hope. I had a bad concussion when i was 18 i think. Took years before the pain went away. I think i got migraines almost weekly for about 4 years. I dont remember how long it lasted. Then it went to once every 2 month. Now i dont even remeber when my last migraine was. Never got treated for it. I was already used to chronic pain since i had a hit and run when i was 8 that left my with a painfull leg, so i didnt care about pain that much. So yes it can go away after years.

What mark said about the neck etc. is true. Now on my second bad concussion (which is almost gone) physical therapy resolved pain fast. These things can be adressed.