When dealing with a patient with severe photophobia, you might want to dim the light out for the patient just to make the patient comfortable. Say, "I see that the light is making you uncomfortable, let me dim the lights out for you to make you feel more comfortable."
Then you start taking history.
Think of differentials, then ask about -
Migraine - Ask about aura, catamenial migraine
Cluster headache - Ask about tearing of eyes, rhinorrhea
Tension headache - Ask about stresses in life
Meningitis - Ask for neck stiffness, fever
Then you start taking history.
Think of differentials, then ask about -
Migraine - Ask about aura, catamenial migraine
Cluster headache - Ask about tearing of eyes, rhinorrhea
Tension headache - Ask about stresses in life
Meningitis - Ask for neck stiffness, fever