I'm a 29year old female and for the past week and a half I've had discomfort/ pain in my left side of my head. The pain starts a little above my tepmporal area and goes down behind my head. My doctor is currently treating for a sinus infection. I have had a number of sinus infections in my past and NEVER experienced discomfort like this in my head. What can it be, I really concerned, and I like my doctor thinks i'm just being crazy!
The primary reason would be any injury/trauma to that place. Please recollect since couple of days if you had any injury. It may be mastoiditis or some infection in the ear also. The frontal sinus & maxillary sinus cannot be behind the back of the head it is a least possibility of a sinus . If the pain comes from cheeks and go behind the ear or ont he forehead and goes back then it may be a Sinus.
Please visit a Physician and take some pain killers for the pain.
Take care!