I'm fairly sure that whatever was wrong with you before is wrong with me. I have other symptoms too aside from my peeling lips, such as bloating (my stomach used to be so flat!!) and my mouth gets dry in the morning. And there's a lot of little things like that which show me that I have an internal problem. Diet helps but I can't stop partying and giving in to restaurants.. maybe one day.
Anyways, the point of this post is that yeah I got an endoscopy. The only thing that it showed was some bleeding in my stomach which was kind of surprising, but I was told it's common. So yeah.. not really much there.. I honestly think that this is related to either food allergies or some kind of bacterial overgrowth in the gut. Immune system seems to be a good bet.
Also, wanted to tell you that I think you're a cool dude for making a website and helping people. And you said you used to get drunk and high a lot which is cool too.