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Skin Cancer Prevention

The Sunburn-to-Skin-Cancer Timeline

What a single bad burn sets in motion.

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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