What Causes Soreness In Lips?

Hello, I'm tired of lips that look perfectly normal, but are sore most of the time. I've never had a cold sore or canker, but since I turned a teenager, my lips feel burned and uncomfortable. I began carrying a tiny little aspirin container with vaseline before chapstick, etc. became available to me. I've varied brands, and most recently used Carex, but nothing cures the discomfort. I awake in the night needing to renew it for a temporary relief.



My 52 yr old daughter has the same problem, and her 14 yr old daughter also carries chapstick. We're all addicted, though I did Not teach this to them.



Any ideas as to cause or aid? Thanks, Judith