@dancing1 Gee, I’ll bet that is awful. Do you have any health conditions or take any medications that could contribute to this problem? And the dermatologists you saw had no idea? I might suggest that you widen your search. Have you found any comprehensive medical centers or university hospitals somewhat near you? Usually the doctors there are a level above community doctors, so you may have more luck. In my case, the local physicians had no idea what was wrong except that i had ‘spots’ on my brain that shouldn’t be there. My husband took me a university medical/teaching center and the neurologist knew exactly what it was. Thank heavens! You may have to travel a bit but it’s so worth it!
Here is some good information from The Cleveland Clinic:
https://my.clevelandclinic.org/health/diseases/22005-chapped-lips#:~:text=Bleeding%20occurs%20when%20the%20cracks,ointment%20designed%20for%20lips%20specifically.
Will you get back in touch and let me know what you learn from large hospitals?