The skin on the lips is thinner than the skin on the rest of the body, and it has less melanin, the pigment that helps protect the skin from UV radiation. This makes the lips more susceptible to sunburn, which can be painful and can cause long-term damage to the skin. Applying a lip balm with SPF or a broad-spectrum sunscreen to the lips can help protect them from the sun's harmful rays. Similarly, the skin around the eyes is thinner and more delicate than the skin on other parts of the face. This area is also more prone to wrinkles and other signs of aging due to sun damage. Applying sunscreen specifically formulated for the face and eyes can help protect this sensitive area from the sun's harmful rays.