Anyway, I'm back from the hospital. The consilium (not sure how to translate it) of doctors there really tore my dermatologist apart and instead proposed it was just an allergy and it was natural for mucin to be inside the lips (not sure about that but whatever). Their proposal was for me to use antihistamines, which I've told them I've used for a year straight, despite all allergy tests being negative etc. I am to come back there in 1 month.
Feel bad about my derm. She really tried to bring out the whole mucin issue to her colleagues but they're a bunch of a-holes.
My derm originally prescribed Elidel (pimecrolimus) twice a day for the mucinosis, but I've already tried it for a month before with a different doctor and I guess there was maybe some progress, though they really need to be moisturized constantly. That's why I was referred to a group consultation in the same place by her.
I guess I'll try a few months, instead of a few weeks, of Elidel and see how it goes.