I do not have ON ...I have a form of T.N. perhaps you have T.N. Others with T.N. have presented with pain and burning in the areas you mention. You did not mention eye pain or eye issues ??
I can give you info about T.N. or maybe you would like to visit our T.N. forum here and post this question or read some of the posts there..maybe it will help.
here is the link.
http://neurotalk.psychcentral.com/forum26.html
Let me know if I can be of help to you.
PEACE
BMW