I have something similar my doctor says a-typical TN my neurologist disagrees and says its some type of A-typical migraine in my eye, my pain is behind my eye and has been constant for 6 weeks, it's really annoying especially as pain killers don't even touch it and I never get a break from it. I'm going to look into a blockage of the sinus as I refuse to believe that this condition has come from nowhere with no reason