Did you ever find out what this was? I have two of them I've noticed recently and one of them has pain. Please email searcherrr at yahoo dot com if you found out what it was. I'd really really appreciate it.
you should see your dentist. there are salivary glands under the tongue. they can become painful and have stones, or other issues. there can be no other way to diagnose than an oral exam at a dental office.
I had something like a skin tag under my tongue. My tongue was sore. I used Listerine mouthwash daily and wash mouth with salt and lukewarm water. After 4 days it healed up. I'm good. No doctor.