The question we need to ask is, do we know where the headache pain is coming from? Pain starting in the base of the skull typically has an origin from the neck. A self-screening tool is to place your thumb behind the ear bone and push in gently but firmly. While holding this pressure if you start to have pain into the head or face this is called referred pain and your neck may be the cause.
Check out this video on testing for the neck and how this relates to headache pain.