I want to add that the oral pathologist I saw over 16 years ago found excessive yeast on my lips. He peeled the buildup that was on my lips at the time (didn't hurt but I'm sure it caused trauma) and then took a swab and did a culture test. It came back with a positive test for excessive yeast. He gave me an anti-fungal pill to take over a course of a few weeks and it did help improve my condition somewhat.
I'll be going to see the same oral pathologist on Monday of next week. I hope 16 years gave him a bit more experience in trying to deal with such a rare condition such as this.