The "doc" says:
"First thing get your upper neck checked out. Nerve supply from there goes back into the face. Seem a lot of skin problems clear up over the years just by getting the neck squared away."
I am not sure what sort of medical specialist this poster was, and he wasn't too clear about what he was talking about - probably, as you say, some kind of chiropractor type of thing.
I have not had any neck pain or problems, myself.
Additionally, I think it's pretty tenuous to suggest that nerves in the upper neck have something to do with the lip skin flaking off.
However, I think it's good to be open to all possible explanations, however wacko they might seem, and then looking at them logically, and giving some a try, if they seem do-able.
I had a huge, awful rash on my neck, eyelids, and ears for one year in my late 20s, and I tried everything possible, eliminated everything that touched my face, chemicals, etc., saw many western medical doctors in Boston, applied medicated creams, and nothing helped -
then one week, by chance, I stopped wearing clear nail polish on my toenails, and the rash on my head went away immediately, and never came back.
This little bit of nail polish, put on a semi-hard, tiny part of my body that was 5 feet away from my neck and which never came into contact with my neck, was causing my eyelids, ears, and neck to look like someone had smushed up a bunch of ripe raspberries and smeared them all over my head.
My body apparently didn't like the toenail polish, and was telling me loud and clear, it's just that the two things had seemed so unconnected before that.
So, I think that any one individual's reason for having overly-exfoliating lips could be pretty crazy and random! There are hundreds of possible causes.
SWK, it's great that you are reading through the really old posts to see what others have gone through. There is a lot of wisdom and experience in those old messages. And some are funny too - I had a lot of laughs the other night from the posts of "seattle".
It's frustrating that some of those people aren't around anymore. Even if they didn't find a solution to their cheilosis, and reasonably gave up on the forum in order to concentrate on more positive areas of their lives, at least they could have signed off by saying what had helped them, what hadn't, what state their lips were in as they left the forum, etc.
I promise that if I find something that helps, or even if I don't, I'll leave a message summarizing my experiences before I leave the forum.