Many headaches are caused by the top vertebra (C1 or atlas) out of alignment. This puts pressure on the nerves that control blood vessels that supply the brain, cranial nerves that go to eyes, ears, nose, throat, immune glands, and affect balance and blood pressure and the endocrine (or hormone) system.
Assessing the posture gives us a picture of what's going on with the alignment, checking range of motion helps determine which segments are fixated or stuck and computerized nerve scans tell us which nerves are pinched or irritated. Whiplash injuries such as car accidents and ski/snowboard falls contribute to a loss of the natural curve of the neck putting further pressure on these delicate nerves.
If you are suffering from headaches or migraines, or have had concussions and whiplashes in the past, make sure to get your neck assessed and adjusted! Many techniques can be utilized from manual osseous styles to gentle instrument adjusting.