Greg,

I can't say what has caused mine, but yours is the typical scenario. My early episodes presented as tooth problems only they continued after treatment. Some of my other episodes presented as sinus problems, but all the typical treatments and tests were negative. Its a tough condition to diagnose and to treat. Medications are also a diagnostic tool, the most prominent being Tegretol. Have you seen a neurologist? If not, you should as they are best educated to deal with this.

Take care and good luck, EE