Seeing an oral medicine specialist is advised.
I have same problem, hope someone can help.
If there is no systemic or local disease contributing to burning tongue condition, clonazepam lozenge is the treatment of choice. In addition, nutritional supplement Vitamin B1,B6,B12, folic acid , alpha lipoid acid, as well as omega3 fatty acid may also be helpful.
its probably because u literally burned it , maybe by drinking something hot because it wouldn't be for no reason