Thanks for your reply. I have had biopies that came back sjogrens and then 6 months later and no healing from various steroids, they biopsied again and it showed lichen planus. Just had allergy testing and nothing there so its not my fillings. The allergist says I'll probably never know what is causing the ulcers, just have to concentrate on healing them, but 18 months and several different drs, no results. Don't know where to turn next. Very frustrated, just hope I can keep it all from turning to cancer again. Can't afford to loose another 1/3 of my tongue again. Good luck to you.