I agree with Martin, morning you should definitely stay away from vaseline. If your looking to try something new order some melatonin drops/creme and try mixing it with the shea butter. People seem to see changes with melatonin, you should give it a shot its under 10$
Also I suggest saving your time and money, stop going to that derm. SHe clearly has no idea how to treat cheilitis and is doing some poor guesswork which isn't right..
I've been using this lotion for a couple years now and it helps ease inflammation + makes some of the peeling skin re-bond to the lips.