Sunscreen and skin checks: a year-round plan, not a summer habit

The most effective skin cancer prevention plan runs all twelve months of the year, not just the beach weeks of summer. Ultraviolet exposure accumulates every day the sun is up, including through clouds and windows, so daily broad-spectrum sunscreen and a regular schedule of skin checks do more to lower risk than any seasonal effort.

Start with the sunscreen basics that dermatologists actually agree on. Use a broad-spectrum product of at least SPF 30, apply it to all exposed skin about fifteen minutes before going out, and reapply every two hours and after swimming or heavy sweating. Most people use far too little; roughly a teaspoon for the face and neck and a shot-glass amount for the body is the working guide. A high SPF applied thinly behaves like a low one. For an independent overview, see Skin cancer screening and self exams: what to know.

Sunscreen is only one layer. Wide-brim hats, UV-protective clothing, sunglasses, and shade during the peak hours of roughly 10 a.m. to 4 p.m. block far more ultraviolet than lotion alone, and they never wear off. Winter and overcast days still deliver UV, and snow, water, and sand reflect it back, so the habit belongs in the routine year round rather than in a summer drawer.

The second half of the plan is looking. A monthly self-check in good light, front and back, including the scalp, ears, hands, and feet, helps you learn what is normal so you notice what is new. The simple rule is to flag anything that is new, changing, or not healing, and to have a spot checked rather than watched if you are unsure.

Professional skin exams complete the picture. Adults with past sun damage or a family history benefit from a periodic full-skin exam, and anyone who has already had a skin cancer should follow the surveillance schedule their dermatologist sets, often every six to twelve months, because a first skin cancer is the strongest predictor of a second, as covered in preventing the next skin cancer.

None of this is complicated, and that is the point. A daily sunscreen habit, sun-smart clothing, and a standing appointment to get your skin looked at will catch the great majority of skin cancers when they are smallest and simplest to treat, long before anyone needs to weigh Mohs against other treatments.