Is this pain severe and for how long the headache attack lasts?
Have you visited ophthalmologist to check for eye disorders?
Have you been treated for migraine?
Are you experiencing a jagged zigzag pattern of shimmering lights in the side vision before the headaches start?
Do you feel tingling or numbness on the same side of your face?
Do you have tearing and nasal drainage on the affected side?
Are you suffering from infections of your sinuses?