I think everyone is different. Really. I had my sore on my tongue for ages. For the longest time I thought it was allergies. I'd been biopsied and was negative for cancer. I went to LA one year and did a lot of yoga, came down with a rash all over and my tongue felt better... that's what made me think it might be an allergy. Even before my second biopsy I said to the ENT my tongue looks better and feels better. The guy said. I still don't like it now open up. And he snipped out a piece. It was cancer.

People's bodies are made to fight foreign cells by nature. Maybe his immune system is working to try and solve the problem - whatever it is. However, I would seriously get to an ENT and have it checked out or biopsied just to be on the safe side.

Not trying to scare you... but for your own piece of mind! take care.