Persistent headaches that are unrelieved by clearing the cervicals, the cranial rhythms,, and occipital tension can have a hidden and often unsuspected etiology.
The key, discoverable by a highly trained, Advanced Proficiency Rated Activator Chiropractor like myself, may lie in the position of the posterior arch of C2.
When the arch is abnormally stressed superiorly, it often causes a headache.
This is quickly and comfortably corrected with the Activator instrument, applying the correct contact on the C2 posterior arch, and vectoring the instrument to make the adjustment.