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Skin Cancer Prevention

The Sunburn-to-Skin-Cancer Timeline

What a single bad burn sets in motion.

An open illustrated book showing trees through changing seasons.
By the numbers

The AAD projects 234,680 new U.S. melanoma cases in 2026 (122,680 in situ; 112,000 invasive).

The landmark Nambour trial concluded melanoma may be preventable through regular sunscreen use in adults.
What the evidence actually says — American Academy of Dermatology — Skin Cancer Statistics

Questions we get a lot

What are the early warning signs of melanoma?

Watch for the ABCDEs: Asymmetry, irregular Borders, uneven Color, Diameter over about 6 mm, and Evolving (changing) spots. Also note any 'ugly duckling' mole that looks different from your others, or a sore that won't heal. See a dermatologist promptly about anything new or changing.

How often should I get a skin check?

Examine your own skin about monthly, and see a dermatologist for a professional check at least yearly — more often if you have many moles, fair skin, a history of sunburns or skin cancer, or a family history. Early detection makes melanoma highly treatable.

What does the ABCDE mole rule mean?

ABCDE is a checklist for spotting possible melanoma: Asymmetry, Border irregularity, Color variation, Diameter greater than about 6 mm (a pencil eraser), and Evolving size, shape or color. Any mole meeting these — or simply changing — warrants a dermatologist's evaluation.

What people keep asking

r/SkincareAddiction: 'How often should I actually get a skin check?'

Sources & citations

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