I have had oral lichen planus on my
gums, lips and sometimes
tongue for some years now; not as a result of treatment but as a result of Hepc. It is painful and is aggravated by anxiety, stress, some weather changes, and substances such as cinnamon, spicy food, vinegar, whitening toothpaste etc.. You have to stay away from certain things that aggravate it. I wouldn't use any kind of substance that would cause something like this to burn.