Sunscreen and Skin Cancer Prevention: What 40 Years of Data Show
The long-view evidence, beyond a single study.
Having more than five sunburns doubles melanoma risk; one blistering childhood burn more than doubles lifetime risk.
Caught early and localized, melanoma has a 5-year relative survival rate near 100% (SEER).
Frequently asked questions
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.
How many sunburns increase skin cancer risk?
Risk rises with cumulative burns: research links five or more sunburns to roughly double the risk of melanoma, and even one blistering sunburn in childhood or adolescence more than doubles lifetime risk. Preventing burns at every age meaningfully lowers risk.
Does skin cancer affect darker skin tones?
Yes. People with darker skin get skin cancer less often but are frequently diagnosed later, when it's harder to treat — and melanoma can appear in less sun-exposed areas like the palms, soles and under the nails. Everyone, regardless of skin tone, should use sun protection and watch for changes.
r/SkincareAddiction: 'When should I see a dermatologist about a changing mole?'
Sources & citations
- AIM at Melanoma Foundation, sunburn risk data
- aimatmelanoma.org ↗