Could be related somewhat to environment and winter. I live in Vegas but don't have too much trouble w/ chapped lips. Usually though its when I stop eating plenty of raw animal fats, or when I start eating cooked food. I know cooked food robs the body of alot of water. Coconut oil is a great solution - can take a few days. Also, if you get some raw honey, dab it on your lips and then cover w/ coconut oil right before bed, seems to help w/ chapped lips.