Sun protection is part of everyday life in Australia. Most people know to wear sunscreen, avoid sun during the middle of the day, and to keep an eye on new or changing moles.
However, there’s more to understand about how skin cancer develops and how to protect yourself.
Knowing a few key details can make daily decisions about sun exposure easier and more effective.
What this article covers:
- How skin cancer actually forms.
- What sunscreen really does.
- How quickly sun damage can happen.
- Why UV ratings matter more than temperature.
- The balance between sun exposure and vitamin D.
- What a skin check involves.
How skin cancer actually forms:
Skin cancer usually develops over time after repeated exposure to ultraviolet radiation.
UV penetrates the skin and damages the DNA inside skin cells. If this damage happens again and again, some cells stop repairing properly and begin to grow abnormally.
That can lead to different forms of skin cancer, including basal cell carcinoma, squamous cell carcinoma and melanoma.
Melanoma is the most serious type because it can spread beyond the skin into lymph nodes and other organs. Once that happens, treatment becomes more complex and urgent.
Australia has one of the highest melanoma rates in the world, which is something campaigns such as Melanoma March try to change.
Take a look at some more facts about melanoma rates here.
What to know about sunscreen:
Sunscreen helps protect the skin by absorbing or reflecting UV before it damages skin cells.
In Australia, broad-spectrum SPF 30 or higher is generally recommended.
SPF stands for Sun Protection Factor. SPF 30 filters about 97 percent of UVB rays, while SPF 50 filters slightly more. That extra protection might not sound like much but can help when exposure is higher or more prolonged.
Here are a few practical points:
- Apply sunscreen about 20 minutes before going outside
- Reapply every two hours, especially after sweating or swimming.
- Most people do not apply enough sunscreen.
- Makeup with SPF is usually not enough on its own.
- Sunscreen works best alongside sunglasses, hats, and protective clothing.
How quickly can sun damage happen?
Many people associate sun damage with long days at the beach, but that’s only part of the picture.
When UV is high, skin damage can begin in as little as 10 to 15 minutes, especially with fair skin.
Short exposures also add up. Walking outside, grabbing a coffee outdoors, or eating lunch in the sun can gradually contribute to cumulative damage.
The UV index explained:
The UV index measures the strength of ultraviolet radiation, and it matters more than temperature.
In Melbourne, UV can still be high on cool, cloudy days. It also reflects off surfaces such as water, concrete, and glass, which means exposure is not limited to obvious sunny conditions.
Sun protection is recommended when the UV index is 3 or above. In Melbourne, summer UV levels often reach 8 to 10, which sits in the very high range.
What about vitamin D?
Vitamin D is important for bone health and immune function, but long periods of unprotected sun is not the answer.
Most Australians can maintain healthy vitamin D levels through small amounts of incidental sun exposure during daily life. If levels are low or symptoms suggest a deficiency, a GP can assess this with a simple blood test.
What a skin check actually involves:
A professional skin check is simple, straightforward and usually quick.
Your doctor examines the skin for unusual spots, changing moles, or lesions that may not stand out to you yet. A tool called a dermatoscope helps assess skin structures more closely.
Early skin cancers can be subtle and easily dismissed as a harmless spot. The earlier potential spots are found, the simpler treatment usually is.
If you live in Abbotsford, Collingwood, Richmond, or the Melbourne CBD, Yarra Medical offers professional skin checks and advice on skin health.
If it has been a while since your last check, booking one is a practical step that can make a real difference.
