I am currently dealing with OLP or something similiar (no one can seem to agree...) however my PCP was on the nose to figure out its inflammation, not anything that I've been suggested otherwise (vitamin deficiency, trauma bites, food allergy, oral herpes..)..

She prescribed a dexamethasone .5mg/50mg steroid mouth swish. IT WAS GREAT. It stopped the pain, the itching, the inflammation, and started to heal the tongue ulcers.

My PCP suspects it's a rheumatology symptom, I'm being tested for systemic lupus erythematosus. I will check in with my dentist to possibly have the tongue ulcers biopsied for confirmation, but that's my story with OLP and autoimmune issues.