Why lips cannot just toughen up over time
Because lip skin permanently lacks oil glands, it never develops the same self-moisturizing capacity facial skin has, no matter how consistently balm is applied -- ongoing care is a maintenance habit rather than something lips grow out of needing, similar to how hands do not develop their own defense against dryness either.
The habit of licking chapped lips makes things worse
Saliva evaporates quickly and takes moisture from the lips along with it, so licking chapped lips creates a short burst of relief followed by drier lips than before, often becoming a self-reinforcing cycle where dryness prompts more licking. Keeping balm within reach and using it instead of licking breaks that cycle.
Frequently Asked Questions
Is petroleum jelly enough on its own for chapped lips?
It is an effective occlusive that seals in moisture already present, but it does not add hydration on its own -- applying it over a hydrating product, or after gentle exfoliation of dead skin, generally works better than using it alone on very dry, flaking lips.
Why do some lip balms seem to make chapping worse over time?
Balms containing menthol, camphor, phenol, or salicylic acid can create a cooling or tingling sensation that feels soothing short-term while mildly irritating and drying lips with repeated use, leading some people to reapply more often and end up more chapped than before starting.