Skin Cancer Risk Builds Over a Lifetime, HSE Warns

The HSE is urging the public to rethink their attitude to sun exposure this summer, warning that the quiet accumulation of everyday UV exposure, not just noticeable sunburn, is a significant cause of skin cancer.

Many people associate skin damage with obvious burning, but the HSE says routine activities such as the school run, commuting, walking the dog, and gardening all contribute to long-term skin damage, even on cooler or cloudy days.

Skin cancer is linked to two distinct patterns of UV exposure: cumulative (chronic) and intermittent. Cumulative exposure comes from small, repeated doses of UV radiation during everyday activities, while intermittent exposure involves short bursts of intense UV radiation that often lead to sunburn, particularly during holidays or sunny weekends. Intermittent exposure is strongly associated with melanoma, the most serious form of skin cancer. Both patterns of exposure increase risk, making daily protection and sunburn prevention equally important.

Dr Breeda Neville, Consultant in Public Health Medicine, HSE National Cancer Control Programme (NCCP), said:

"UV damage is cumulative, meaning everyday exposure adds up over time, but it's also important to recognise the danger of intense, intermittent exposure that leads to sunburn. Many people mistakenly associate the sun's warmth with UV exposure. However, what we feel as heat is actually infrared radiation - not UV. Unlike heat, UV radiation cannot be seen or felt, which often leads to a false sense of security. Protecting your skin both every day and during periods of strong sunshine is key to reducing your lifetime risk of skin cancer.

Every moment spent in the sun without protection contributes incrementally to a person's overall risk. It is not just occasional high exposure -such as holidays or heatwaves - that is harmful, but also the thousands of routine, everyday exposures over decades. Together, both cumulative and intermittent UV exposure play a significant role in skin cancer development."

Selene Daly Tarpey, Nurse Tutor, HSE Centre for Nursing and Midwifery Education Sligo Leitrim West Cavan, added:

"Acting now can make a meaningful difference. While previous damage cannot be reversed, reducing both your day-to-day UV exposure and avoiding sunburn can help prevent further harm and lower your risk of developing skin cancer in the future. Think of it like filling a glass - you can't empty what's already there, but you can stop topping it up."

The HSE's NCCP and Healthy Ireland's SunSmart campaign encourage the public to follow the SunSmart 5 S's as part of their daily routine. These are: Slip on clothing that covers your skin, such as long sleeves and collared T-shirts; Slop on SPF 30+ sunscreen for adults or SPF 50+ for children, applied 20 minutes before going outside and reapplied every two hours, or more often if sweating; Slap on a wide-brimmed hat to protect the face, ears and neck; Seek shade, especially between 11am and 3pm when UV rays are strongest; and Slide on sunglasses.

The campaign also reminds the public to protect their skin every day, avoid sunburn, not to deliberately tan, and never to use sunbeds.