I have severe burning of tongue, lips and palate started around July. Sometimes so bad I cannot even eat. I got dentures in June and was diagnosed with thyroid cancer in July, had thyroid removed in September and radioactive iodine. We thought it was a yeast infection and I did a nystatin rinse. It was ok until 2 days after I stopped medicine and started again. Tried Difucan and it was fine for 1 week after stopping med and started again. Getting more severe. We can't seem to determine why - dentist says allergies to dental materials are rare and doesn't think that is it. No visible evidence of yeast yet on meds I felt better and burning stopped. Anyone with dentures or thyroid problems experience this? Don't know what to do next. Thanks everyone and HAPPY NEW YEAR!