Hi Greg Manning
Welcome to HealthcareMagic.
You are experiencing Occipital Headache
.This could be due to cervical spondylitis
or Migraine or Neuralgia
.If you can provide few more details it would be easy for us to come to a diagnosis.
Do you have any neck pain
? When do you get these headaches? Do you have associated aura ?
I advise you to visit your General Physician and get examined for the same.Meanwhile you can take a Paracetmol tab to get symptomatic relief.