The NHS has issued a reminder to the public about a common sunscreen mistake that could leave skin exposed, as the Met Office predicts high to very high UV levels across the UK this week. UV indices are expected to reach 7 to 8 in parts of the South, Midlands, Wales, and the North, with temperatures potentially exceeding 30°C.
The 30-minute rule for sunscreen application
On Instagram, the NHS stated: "Are you applying sunscreen correctly? Common mistakes could be leaving your skin more exposed than you think." The health service emphasised that sunscreen should be applied twice: 30 minutes before going out and again just before leaving. This allows the product to settle and form a uniform protective barrier, preventing it from transferring onto clothing or running off with sweat.
While sunscreen provides some protection immediately, allowing it to set for 30 minutes ensures optimal defence against harmful UV rays. The NHS advises applying it before getting dressed to avoid missing any areas of skin.
Reapplication and expiry date checks
The NHS warns that sunscreen should be reapplied "liberally and frequently," especially after swimming, towel-drying, or sweating. It should be reapplied every two hours, as the sun can cause it to fade. When using an older bottle, check the expiry date and the symbol indicating how long the product remains safe after opening. Once opened, active ingredients deteriorate, potentially rendering the sunscreen ineffective.
Seek shade during peak hours
The most critical mistake is relying solely on sunscreen. The NHS advises seeking shade between 11am and 3pm, when UV levels are typically at their highest. Neglecting sun protection can lead to sunburn, increasing the risk of skin cancer. The NHS emphasises that "people of all skin tones can get skin cancer" if precautions are not taken.
