The NHS has issued a reminder for people across the UK to follow a crucial 30-minute sunscreen rule, particularly as UV levels are forecast to be high to very high this week. The health service stresses that sunscreen should be applied twice: 30 minutes before going out and again just before leaving home. This advice comes as the Met Office predicts UV indexes of 7 to 8 in many regions, including the South, Midlands, Wales, and the North, with temperatures potentially exceeding 30°C.
Why the 30-Minute Rule Matters
Applying sunscreen at least 30 minutes before going outside allows the product to dry and form a smooth, even shield on the skin. This prevents the sunscreen from rubbing off on clothes or washing away with sweat, unlike a single layer applied moments before heading out. Even though sunscreen starts working immediately, waiting for it to dry provides the best defence against UV rays. The NHS advises applying it before getting dressed to ensure no spots are missed.
Failing to protect the skin can lead to sunburn, which increases the risk of skin cancer. The NHS notes that "people of all skin tones can get skin cancer" if proper precautions are not taken. A recent Instagram post by the NHS highlighted common mistakes in sunscreen application, stating: "Are you applying sunscreen correctly? Common mistakes could be leaving your skin more exposed than you think."
Additional Sun Safety Tips
The NHS also emphasises the need to reapply sunscreen "liberally and frequently", especially after swimming, towel-drying, sweating, or if the product claims to be water-resistant. It is recommended to reapply every two hours, as the sun can dry the product off the skin. Users should check the expiration date on sunscreen bottles, as once opened, the active ingredients begin to break down, rendering the cream ineffective.
Moreover, the NHS advises people to seek shade between 11am and 3pm, when UV levels tend to peak. Relying solely on sunscreen is not enough; combining it with protective clothing and avoiding peak sun hours is essential for reducing skin cancer risk.
