after three months of constant headaches due to jolting in my head from every day activies. today i wope up being able to ride a bus without feeling anything... i discovered this problem is due to pinched nerves in my neck.. because the head trauma damaged my neck severely.. after three months of chiropractic work and massage im now symptom free from this issue. the only issue i have is concentration and nausea occasionally..also and anti inflammatory diet in the last week has stepped up this problem.. for others suffering this issue the solution is fixing your neck and posture.. only this will fix the problem..also try to deal with anxiety as it also stops your body from healing..