1. Why both UVA and UVB matter

UVA has a longer wavelength and reaches deeper skin layers than UVB. FDA explains that both can damage skin. When recording a product, check protection against both rather than writing only its SPF number. FDA explanation

2. Check conditions rather than skin tone

WHO recommends protection at a UV index of 3 or above. Clouds do not ensure low UV, and reflected radiation from water, sand or snow adds exposure. Darker skin can also develop skin cancer. Plan shade, clothing, a hat and UV-protective sunglasses; sunscreen is not permission to extend outdoor time. WHO guidance

3. Record the product and exposed areas

AAD recommends water-resistant, broad-spectrum SPF 30 or higher, applied about 15 minutes before going out. Cover exposed skin. Outdoors, reapply every two hours and immediately after swimming or sweating. Water resistance does not remove that step. AAD application guidance

Use a record with ‘product / UVA–UVB label / exposed areas / application time / water or sweat / next check’. A face application is not a whole-body application. Keep the area distinct when checking quantity guidance and product instructions.

4. A fictional beach schedule

Suppose a visitor applies sunscreen at 09:45, goes out at 10:00 and finishes swimming at 10:30. The record should flag the swimming event for immediate reapplication instead of fixing the next action at 11:45. Record the new application time and check the planned shaded rest location and areas that clothing can cover. This is a planning example, not an observed result or a calculation of safe exposure time.

5. Do not wait for a spot to become large

AAD’s ABCDE clues concern asymmetry, border, color, diameter and evolution. Melanoma can be smaller than 6mm. Seek dermatology assessment for new, different, changing, itchy or bleeding spots. AAD skin-change guidance

Record location, first-noticed date, changes and comparison photos for the appointment. Photos are not a diagnosis, and the record does not decide whether a biopsy is necessary.