If you suffer from headaches or migraines that have been investigated by a medical doctor and there is no known cause, then it is likely that the cause is musculoskeletal. Non-optimal biomechanics specifically in the upper neck and base of the cranium (skull), known as the sub-occipital joints (C1/C2/C3) is often the pain ‘generator’. This is because the sensory nerve supply to the skin and other areas of your head comes from these joints. When there is dysfunction in these areas, your brain is unable to distinguish the difference between a headache as opposed to problems in the neck. This is similar to ‘sciatica’ where the pain is perceived in the leg when it is actually caused by problems in the lower back.