Why Do Your Lips Get Chapped?

When you don't moisturize, your skin is bound to dry out, but why does it seem like lips always get chapped?

Read More:

Dry Skin: Lifestyle and home remedies (Mayo Clinic)
"Moisturizers provide a seal over your skin to keep water from escaping. Apply moisturizer several times a day. Thicker moisturizers work best, such as over-the-counter brands Eucerin and Cetaphil."

Acne, Retinoids, and Dermabrasion (The Journal of Dermatologic Surgery and Oncology)
"A group of nine patients with severe nodulocystic acne vulgaris were treated with oral 13-cis-retinoic acid and their acne cleared. During or after retinoid therapy, all patients underwent full-face dermabrasion. Postoperative healing was normal, and no significant complications were seen."