When searching the web for information, pay special attention to the source of the information. Many self help blogs and websites have some information that can be misleading. It is good to stick to those sites associated with a University.
A valuable Canadian site is from the University of Manitoba and supervised by Dr. Anthony Kaufmann.
Dr. Kaufmann's website: http://www.umanitoba.ca/cranial_nerves/t.../index.htm
Your complete guide: http://www.umanitoba.ca/cranial_nerves/t...anuscript/
Another good source is the Facial Pain Association in the USA.
The best reference book is Striking Back, The TN and Face Pain Handbook by Dr. Casey and Mr. Wiegel. It is available from its publisher, the Facial Pain Association. The following is a link to the ordering page on their website: