1. Use a good lip balm
2. Try natural lip remedies like coconut oil, honey and vaseline, rose petals, cucumber, aloe vera, green tea bags, cocoa butter, lemon juice, sugar method, vanilla extract, ghee 4. Drink water?dehydration is the major culprit
5. Avoid smoking (if you do)--tobacco smoke can irritate the sensitive skin around the lips, causing them to dry out and become more likely to crack.
Homeopathic medicines are very effective for this. .for details consult online.