Hey. So sorry to hear that you've been going through this for over 15 years. It started happening to me about 6 months ago and it is really affecting me emotionally/mentally. It seems like there are so many people that have this problem but dermatologists don't really have an answer for it. My doc thinks its eczema of the lips and I've tried Protopic 0.1% ointment for 2 weeks (some redness went down but the peeling was still there). I also tried mometasone 0.1% steroid ointment and it seemed better but I only used it for 1 week because I was afraid it would thin my lips. I hope it gets better for you!