So three days ago, my fimbriated fold under my tongue began to feel slightly painful. The next day, it was really painful. Today, it`s still painful and my second fold feels uncomfortable. Another symptom is a dry mouth with chapped lips. I have a teeth retainer. This is really annoying because it hurts to talk, eat, and drink.
It is difficult to determine the cause of your pain from your description. It is possible that you could have scratched this area with something like a potato chip. It is also possible that you could have a lesion similar to a cold sore that will take 7 to 10 days to heal.