This is a mysterious autoimmune disease and usually the docs don't speak of causes but of triggers. Any old virus may trigger it--and Covid is a culprit, along with the flu and even maybe the vaccines for viral disorders. After all, vaccines elicit an immune response--and an immune response can be an autoimmune response too.

It is possible that a person has a non-symptomatic OLP condition that suddenly flares after an autoimmune response to a vaccine or an actual viral infection. I don't think I am saying anything controversial here. Drugs are also said to trigger OLP, in particular beta blockers and ace inhibitors but also NSAIDS--which is pretty wild. If you are using such drugs, consider tapering off.

I'm an OLP sufferer, not a doctor, but I've been researching like crazy. It is just so hard to find a dentist or a doctor who knows anything at all about OLP.