I have no answer, but to say I agree with what the others have said, I have a and some positive vibrations,(said in my best bob marley voice) that this dang headache(no pun intended) goes away.hope this persistent PITA gives it a rest soon, pretty sure you would like that too I hope you can get some more answers, have any of the docs mentioned a a pain specialist?, thats who my neuro sent me to but my TN is not as bad as yours or as bad as some others on here,