It seems like I have stomatitis.

At first, was it just a canker sore that was causing discomfort?

After a few days, at some point, every time I eat food

It was burning and hurting, and now a round inflammation has appeared.

Maybe it's because my immune system has weakened...

This is the first time I've experienced tongue pain since I was born.

I should go to the hospital and take my medicine, right?

Has anyone experienced sialadenitis?