My bottom lip is swollen & cracked, but it's because I fell full weight into my armoire d/t my poor sense of balance! Had a nice shiner, too.. No fun, this P.D. If it isn't one thing it's another!

My dentist recommended Biotine mouth rinse. It helps me a lot.

You might try putting Milk of Magnesia on the sores, I have done this in the past and it helps to make them less painful and seemed to heal faster...

I have been to 3 dentists , an oral surgeon and a dermatologist with no answers. Thank you for your suggestion.

I would go to the Dr as soon as I could.