Hi there, I have recently been biting the underside of my tongue when eating. It then causes a sore which becomes swollen and contributes to more biting. I’m able to break the cycle if I’m very careful eating. I did notice it began happening when I changed which side I chewed my food on because I was having a root canal and crown done and I didn’t want to apply too much pressure on the side being worked on. The dental work is done now, but I still keep biting the underside of my tongue!
What I’m also fascinated by is that I have several similarities with the others that replied to you.
I too have autonomic neuropathy, degenerative disease, and acute anxiety issues that cause me to clench.
For anyone wondering, it is worth asking a neurologist (if you can) about this as it can be more than a dental alignment issue.
I see a neurologist who specializes is nervous system disorders such as MS, so I intend on asking him about the biting just to be on the safe side. I can update this thread with anything I learn at my next appointment in January.
For anyone following this subject, I hope you will also share anything you learn as well.