I think the excess keratin represents the body's best ability to heal itself even though it may not work well enough in terms of speed of healing and appearance. In times like this I believe the lips are trying to heal itself but are unable to due to repetitive trauma, allergies, infection, nutritional, etc. I believe the lips will heal given the right circumstances. The body has an inherent ability to repair itself if it is operating at an optimal level. The hard part is knowing what the right thing is to do and how to do it. I've tried multiple attempts at leaving it alone to no avail, which leaves me to ask what it is that is missing or what it is that I am not doing that I could be doing. It's a complete quandary sometimes, leaving you puzzled, frustrated, angry, and tired; each time you have to pick yourself up and keep searching and trying unless you are set to just accept it and not have it concern you any longer.