Sunscreen and when to get a mole checked
Use a broad-spectrum sunscreen of SPF 30 or higher on all exposed skin, ears and neck included, and reapply every two hours or after sweating or swimming. Once a month, check your skin with a mirror for moles that are uneven, ragged, multicolored, larger than a pencil eraser or changing, and show any of those to a doctor.
About 10 minutes to learnTake care: injury or damage if careless
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How to do it
- Apply broad-spectrum sunscreen, SPF 30 or higher, 15 minutes before going out, using about a shot glass worth for the whole body.
- Cover the spots men miss: ears, the back of the neck, the scalp where hair is thin, and the backs of hands.
- Reapply every two hours, and after swimming or heavy sweating.
- Wear a hat and sunglasses and seek shade in the middle of the day.
- Once a month, check your whole body in a full mirror, with a hand mirror or a partner for your back.
- Look for the warning signs: asymmetry, ragged borders, several colors, bigger than a pencil eraser, or any change.
- Photograph moles you want to watch so you can compare.
Stop and call a professional if
- A mole or spot changes in size, shape or color, bleeds, itches or will not heal: see a doctor or a skin specialist.
- Severe sunburn with blistering over a large area, fever or chills: get medical care.
- This page explains what to watch for; it cannot tell you what is wrong. Only a clinician who examines you can.
Common mistakes
- Only using sunscreen at the beach.
- Applying a thin layer once in the morning.
- Forgetting the back and the scalp.
- Using tanning beds.
Quick self-check
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Teach this to someone
A one-page sheet for showing a friend, a roommate or a kid: what to say, what to show, and one question to check it landed.
Teach: Sunscreen and when to get a mole checked
What to say
Use a broad-spectrum sunscreen of SPF 30 or higher on all exposed skin, ears and neck included, and reapply every two hours or after sweating or swimming. Once a month, check your skin with a mirror for moles that are uneven, ragged, multicolored, larger than a pencil eraser or changing, and show any of those to a doctor.
What to show, in order
- Apply broad-spectrum sunscreen, SPF 30 or higher, 15 minutes before going out, using about a shot glass worth for the whole body.
- Cover the spots men miss: ears, the back of the neck, the scalp where hair is thin, and the backs of hands.
- Reapply every two hours, and after swimming or heavy sweating.
- Wear a hat and sunglasses and seek shade in the middle of the day.
- Once a month, check your whole body in a full mirror, with a hand mirror or a partner for your back.
- Look for the warning signs: asymmetry, ragged borders, several colors, bigger than a pencil eraser, or any change.
- Photograph moles you want to watch so you can compare.
When to stop and call a professional
- A mole or spot changes in size, shape or color, bleeds, itches or will not heal: see a doctor or a skin specialist.
- Severe sunburn with blistering over a large area, fever or chills: get medical care.
- This page explains what to watch for; it cannot tell you what is wrong. Only a clinician who examines you can.
The check question
Ask: How often should you reapply sunscreen outdoors?
Related skills
- What health checkups men need by age
- How to shave without razor burn
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- Every skill in Health and Body Upkeep
Sources
- National cancer prevention guidance on skin cancer, current edition. Checked September 28, 2026.
Last reviewed . First published .