Good luck with your treatment. I will be waiting for your updates. I had a lip biopsy 12 years ago and the diagnosis said I have chronic non-specific stomatitis. I think that's what caused my exfoliative cheilitis because I have dry and peeling lips, which has a 1-week peeling cycle. The diagnosis also said the squamous epithelium is somewhat thickened over tissue which has an infiltrate of chronic inflammatory cells associated with mild vascular engorgement. I will try to see if I can take 50mg Azathioprine and 25mg Doxepin like you and Daniki. What do you think about my diagnosis and me trying out these medications? Thanks for the help. Hope it will work for you!