I’m a female 68 years old and I’ve had burning mouth syndrome for several years. It’s all on the side of my tongue. I too went to my PCP then ENT then dentist and finally the neurologist. The neurologist prescribed lamotrigine. 200 mg three times a day. It has been a great help. Then the last time I went to my dentist again. He suggested xylimelt tablets. When it’s especially bad
a tablet and put one on each side of my tongue and let it dissolve. That’s a great help too.