About 3-4 months into this disease with what I now feel was a virus attacking me I developed the most painful trigeminal neuralgia. I could not even bit down on a piece of meat without getting stabbing pains in teeth. Hot and cold liquids caused severe pain. One time at the dentist with a very bad cavity the novacaine numbed the tooth he was working on but when using that blast of air on my teeth on the other side I almost jumped out of the chair. This teeth nerve pain is still with me 22 years after getting sick but is more sporadic now. I guess it is like all the other symptoms with me/cfs. You just don't know what symptoms the next day will bring.