The only thing that worked for me was Botox. Unfortunately, it does start to wear off and you have to keep going back. I have tried every homeopathic thing on the market. Acupuncture worked but I had to go twice a week --- and sometimes three times. TN has no rhyme or reason, and I think I kept trying to find one. I tracked the weather, types of storm fronts, temperature, barometric pressure, foods, talking, -- everything so that I could think of so that if I could just stop doing that thing or putting myself in that situation it would go away.
It didn't. It's nerve damage plain and simple. Block the nerve. Homeopathy may help heal the nerve but that takes time -- and the older you get the longer it takes.
Been living with TN2A for 7 years now, post head trauma. The pain has changed over that period of time, which gives me hope that the nerve is healing -- similar to when you have a pinched nerve. It went from blinding, drop to your knees pain to cattle prod electric shocks to burning shocks with steady burning pain.
So, right now, my answer is Botox -- tough to find a neurologist that will administer it, however, and more often than not, insurance won't pay for it.
Just puttin' my 2 cents out there...