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In your case, it is better to rule out other causes of headache in following hierarchy:
-Infection like herpes zoster
. It lead to rash with severe pain
in concern nerve area.
-Pathology in ear, teeth, sinus or eyes, specially infection
-Neurological cause: may need MRI for that.
Your treatment will depend on cause of headache.
I hope this information has been both informative and helpful for you.
Wish you Good Health.
Dr. Ashish Mittal