Post-Traumatic Headaches
According to the American Council for Headache Education, it is estimated that there are over 450,000 new cases of chronic post-traumatic headache in the United States each year.

Post-traumatic headache is head pain that follows significant head trauma or injury, defined by at least one of the following criteria:

• Loss of consciousness
• Post-traumatic amnesia that lasted more than 10 minutes
• Relevant abnormalities confirmed by two or more of the following tests:
  • clinical neurological examination, skull X-ray, CT scan, MRI, evoked potentials, spinal fluid examination, vestibular function studies, neuropsychological testing

Approximately 70-90% of people who suffer from a whiplash accident develop headaches.