I have had burning mouth syndrome for 18 months. There are a lot of causes for this awful syndrome. There is a very good Facebook group called Burning Mouth Syndrome which has a lot of things people have found that helps them. It is a supportive group. My burning isn’t as severe as it was since I stopped my medications 4 months ago. It was bad throughout the tapering process though. I hope you manage to find something that relieves your pain. Take care.

I'm thinking so

Burning tongue syndrome?

I dont know if low B12 could be it because I get B12 shots every 3 weeks.

Not enough off vit b12 can give you tongue burning, also many people with fm do not have enough vitb12...