Chapped lips – is a condition whereby the lips become dry and possibly cracked. It may be caused by the evaporation of moisture. Often the lips become dry because the layer of oil that is naturally produced by the body to coat the lips is removed or is lacking.
Lips have almost no melanin, the natural pigment in skin that helps screen out the sun’s harmful rays. Your lips’ natural tendency toward dryness and chapping is aggravated by the fact that they are more prominent than almost any other part of your body–and most of the time they are unprotected by clothing and fully exposed to the elements. While exposure to sun, wind and cold can obviously speed the rate of moisture loss, your lips aren’t even safe indoors. They can suffer from lack of moisture in centrally heated or air-conditioned rooms in which the relative humidity is low.