Chronic chapped lips are influenced by overall health, nutrition, climate, and daily habits. Lips lack oil glands, making them especially vulnerable to cold air, wind, dehydration, and frequent lip-licking—which strips away protective oils.
Deficiencies in vitamins A, C, E, and B complex can also weaken the skin, while certain medications—such as retinoids, lithium, chemotherapy drugs, and high doses of vitamin A—may increase dryness and cracking. When poorly formulated lip and oral-care products are added to the mix, minor dryness can quickly escalate to painful splits, redness, and bleeding.