Sunscreen for Skin Cancer Prevention

Australia has one of the highest rates of skin cancer in the world, with prolonged exposure to ultraviolet (UV) radiation being the leading cause. Sunscreen is a key part of sun protection, helping to prevent damage from harmful UV rays that contribute to skin cancer, premature ageing, and sunburn. Regular use of a broad-spectrum sunscreen can significantly reduce the risk of developing skin cancer, including melanoma, squamous cell carcinoma (SCC), and basal cell carcinoma (BCC).

At Karratha Medical Centre, Dr Amir Waly emphasises the importance of sun safety and early detection in maintaining skin health. Sunscreen, when used correctly, is one of the most effective and accessible ways to protect the skin from UV-related damage.

How Sunscreen Helps Prevent Skin Cancer

Sunscreen works by forming a protective barrier on the skin, either absorbing or reflecting UV radiation before it can cause harm. Broad-spectrum sunscreens protect against both UVA and UVB rays. UVA rays penetrate deep into the skin and contribute to premature ageing and long-term damage, while UVB rays cause sunburn and play a direct role in the development of skin cancer.

Using sunscreen daily helps prevent the cumulative effects of sun exposure, which can lead to DNA damage in skin cells. This damage increases the risk of abnormal cell growth and, over time, the formation of cancerous lesions. Applying sunscreen as part of a sun protection routine reduces this risk and helps maintain healthier skin.

Choosing the Right Sunscreen

Not all sunscreens offer the same level of protection, so selecting the right product is important. A sunscreen with a Sun Protection Factor (SPF) of 30 or higher is recommended for effective protection. Broad-spectrum coverage ensures defence against both UVA and UVB rays.

Water-resistant formulations provide added protection for activities such as swimming or sweating, but reapplication is necessary to maintain effectiveness. Sunscreen should be applied at least 20 minutes before sun exposure and reapplied every two hours, or more frequently if swimming or sweating.

Sunscreen should be used on all exposed skin, including commonly overlooked areas such as the ears, neck, hands, and feet. For individuals with sensitive skin, fragrance-free or mineral-based sunscreens containing zinc oxide or titanium dioxide may be suitable alternatives.

Frequently Asked Questions

How often should sunscreen be applied?

Sunscreen should be applied every two hours when outdoors and more frequently if swimming, sweating, or wiping the skin. Even water-resistant sunscreens need reapplication after extended water exposure.

Can I rely on sunscreen alone for sun protection?

While sunscreen is an essential part of sun safety, it should be used alongside other protective measures, such as wearing a hat, protective clothing, sunglasses, and seeking shade during peak UV hours.

Is sunscreen safe for daily use?

Yes, sunscreen is safe for daily use and is recommended as part of a regular skincare routine. Using sunscreen every day, even when it is cloudy, helps prevent cumulative sun damage.

Does sunscreen expire?

Yes, sunscreen has an expiry date, and using expired sunscreen can reduce its effectiveness. It is important to check the packaging and store sunscreen in a cool, dry place to maintain its protective properties.

Can I get enough vitamin D while using sunscreen?

Sunscreen does not completely block vitamin D absorption. In Australia, incidental sun exposure during daily activities is usually sufficient to maintain adequate vitamin D levels while still protecting against harmful UV radiation.

For personalised advice on skin cancer prevention and sun protection, a consultation with Dr Amir Waly at Karratha Medical Centre provides expert recommendations based on individual skin type and lifestyle.

For more information, visit these reputable sources:

Cancer Council Australia – Sunscreen & Sun Protection
Australasian College of Dermatologists – Sunscreen and Skin Cancer
Australian Government Department of Health – Sun Safety
HealthDirect Australia – Sunscreen Guidelines
Therapeutic Goods Administration (TGA) – Approved Sunscreen Products

Disclaimer: Any treatment requires a medical consultation. Individual results may vary.

This information is general in nature and does not replace professional medical advice.