Does a major component of the headache include the neck? Is there pain with range of motion; do you elicit tenderness of paracervical muscles or trapezii?
Just realize that if you identify the neck as culprit, percuss the cervical vertebrae one-by-one to be sure there’s no bone disease like an osteomyelitis or a metastasis.
See also posting Low Back Pain & Neck Pain.
DiagnosisDude 