How Ultraviolet Exposure Ages the Skin

Editorial update: October 8, 2026.

Ultraviolet exposure contributes to early visible skin aging and increases skin-cancer risk. Protecting your skin from the sun is an everyday habit, not a promise to reverse existing damage.

Read SPF correctly

Choose a broad-spectrum sunscreen and follow its Drug Facts directions. Broad-spectrum labeling indicates protection against UVA and UVB rays. SPF measures sunburn protection; it does not tell you how many extra hours you can safely stay in the sun. A higher SPF does not remove the need to reapply.

Reapply at least every two hours, and follow the product’s instructions after swimming, sweating and towel drying. Use a sunscreen labeled water resistant for swimming or sweating. Its 40- or 80-minute label describes tested water resistance, not waterproof protection.

Combine sunscreen with other protection

Use shade, protective clothing, a broad-brimmed hat and sunglasses, and limit exposure when the sun is strongest. Avoid indoor tanning. Sunscreen should be used with these measures rather than as a reason to spend longer in the sun.

Choose cosmetics for everyday care

Cleansers remove surface buildup, while moisturizers help skin feel softer and more comfortable. Products for the appearance of uneven tone or fine lines should be chosen using their individual descriptions, ingredients and directions. Do not assume that a cosmetic repairs sun damage or replaces medical assessment.

If a spot is new, changing or concerning, see a dermatologist. A clinician can assess it and discuss appropriate care.

Read the FDA’s sunscreen guide and sun-safety advice for more information.