Yes, it’s part of Sjogren’s; includes dry eyes, dry mouth, and burning vulva. There is a blood test for it but it’s not very reliable. I take amitripylin at night, use Theratears recommended by my eye dr. At night and in the a. m. plus avoid really acidic triggers( for me..strawberries , walnuts, lemonade, & the worst of all—raw pineapple. You can google burning tongue and see examples of that. I believe The Mayo Clinic has a web page with many conditions where the tongue looks a certain way. P. S. I also take sublingual Vit. B12 and carry water everywhere!