It sure would be helpful to get as much info on you in the beginning. Having Hashimoto's is a huge pointer to other autoimmune issues.

This is our autoimmune forum:
http://neurotalk.psychcentral.com/forum44.html

You can use the search function at the top right of the first page of any forum to search your topic.

Autoimmune disease tends to cluster in some patients. The triggers can be vaccines...as one example.
But there is a dietary cause called gluten intolerance/Celiac which has with time, been shown to affect the thyroid and nerves and many other parts of the body. Some thyroid disease runs in families, and this may be an autoimmune tendency as well.

Please read this link:
http://sites.google.com/site/jccglutenfree/

Autoimmune issues are explained in the Dr. Blaylock YouTubes.
Really that should be your first stop.

This poster:
http://neurotalk.psychcentral.com/sh...023#post830023
He is finding positive results from steroid treatment for his supposed vaccine injury.

It is also, a topic, that doctors avoid typically. So getting confirmation of a trigger of vaccines for YOU will not be easily forthcoming. The poster in the link above, is unusual in that his doctor links his nerve problems to the H1N1 vaccine. But that is not the typical way one would be diagnosed today IMO.

In your case an injury during your dental work, which may have repaired itself over time, would possibly be a problem if you are making antibodies to the myelin coating of the axons of the nerves. Once injured, the nerves would attract cytokines in the body and also the antibodies. When this over-reacts, then healing is compromised and inflammation continues instead.

I have some posts explaining nerves/ and nerve signal transmission here:
Sometimes pictures help:
http://neurotalk.psychcentral.com/post828704-7.html

People typically end up here after seeing several doctors unsuccessfully for a chronic problem. And often the answer is not easy to find. All you can do is read what many of us have learned over the years, and are sharing here. Eventually most people find a way to heal themselves. But it can take time and patience.