Upper cervical focuses on precise, gentle alignment of the top three vertebrae. I'd had some success defeating TN pain with a regular chiropractor and his "neck-cracking" methods, but one severe bout around 5 years ago, he tried, and finally said he wasn't able to help me. As a last-ditch effort before meds or surgery, decided to try upper cervical. When I first went to my upper cervical chiropractor, the TN pain was so bad I couldn't speak or chew. By the time I left his office, the pain subsided enough that I could do both. Within 1 week it was 90% gone. Within 3 weeks, gone completely. A year or so later, was in an auto accident that knocked my neck out, and the shocks came back. After adjustments, and about 2 weeks, gone again completely. That was a several years ago now, not a shock since. Highly recommend all patients try upper cervical. Tips from my experience:
1) Find a very experienced upper cervical doctor...it's a very specialized art. If one can't get it, try another.
2) Go 3 times the first week, and then once a week for a month. It took my neck a while to "hold". Once it begins to be trained in the right position, it pops back to the right place automatically.
3) When you leave the doc's office, be careful not to wrench it. I found that after those first few adjustments, my neck could pop back to the wrong spot within minutes
4) Learn how your body feels when it's out. With observation, it's very detectable. Get it straightened immediately.
5) Don't let a regular chiropractor "crack" your neck...it stretches your neck ligaments beyond their normal limits, and actually makes your neck less likely to stay in place during normal life stresses that are placed on it.
6) You won't need to go all your life - I go just to check up about 4-5 times a year, but my neck is now trained in the right spot, and tends to stay there.