A quick glance at a mole can feel reassuring, particularly if it has been there for years. But melanoma risk is not determined by one feature alone. It is shaped by your cumulative sun exposure, skin and family history, the number and type of moles you have, and whether a spot is new or changing. In Australia, where UV levels can be damaging even on mild or overcast days, knowing your personal risk can help you act before a melanoma has time to spread.

Melanoma is less common than some other skin cancers, but it is more likely to spread to other parts of the body if not found early. That is why a changing lesion should not be watched indefinitely at home. A timely skin check can provide clarity, and early treatment can be highly effective.

What increases melanoma risk?

Ultraviolet radiation is the leading preventable cause of melanoma. UV can damage skin-cell DNA, and that damage can build over years. It does not only happen after a severe burn at the beach. Regular exposure during work, sport, gardening, walking the dog or driving can add up, especially when protection is inconsistent.

Sunburn matters because it is a clear sign of skin damage. Blistering sunburns, particularly in childhood or adolescence, are associated with a higher risk later in life. However, people who have never had a blistering burn can still develop melanoma after long-term exposure.

Your natural skin characteristics also matter. Fair skin, light-coloured eyes, red or blond hair, freckles and a tendency to burn rather than tan can increase risk. This does not mean people with darker skin are protected. Melanoma can occur in every skin tone, and it may be diagnosed later in people with skin of colour because concerning changes are more easily overlooked or mistaken for another condition.

Family history is another reason to be vigilant. Having a parent, sibling or child with melanoma can raise your risk, particularly where more than one close relative has been affected or melanoma occurred at a younger age. A personal history matters too. If you have had melanoma or another skin cancer before, you need ongoing surveillance agreed with your doctor or skin cancer clinician.

People with many moles, large or unusual-looking moles, or atypical mole syndrome may need more frequent professional assessment. A clinician can examine areas that are difficult to see yourself and, where appropriate, photograph or digitally monitor particular lesions over time.

The Australian UV factor

Australia has some of the highest skin cancer rates in the world. Our outdoor lifestyle is part of the story, but geography is just as relevant. UV radiation can be strong across Victoria, New South Wales and Western Australia for much of the year. Heat is not a reliable guide. You can be exposed to harmful UV on a cool, windy day, while a hot day can feel less intense late in the afternoon even when protection is still sensible.

The UV Index is a practical tool. When it is 3 or above, use sun protection. Check it in your weather app or daily forecast, then plan around it rather than relying on how bright the sky looks. This is especially important for outdoor workers, tradies, farmers, drivers, runners, golfers, surfers and parents spending long periods at weekend sport.

Solariums are also a significant avoidable risk. There is no safe tan from a solarium. Artificial UV damages the skin in the same fundamental way as sunlight, and use at a young age is particularly concerning.

Melanoma risk is not only about fair skin

Public messaging has often focused on fair-skinned Australians, and fair skin does carry a higher risk. But that message can create a dangerous false reassurance for others. Melanoma in darker skin may develop on the soles of the feet, palms of the hands, under nails or in areas that receive little sun. It can also occur on mucosal surfaces, such as inside the mouth.

Check your whole body, not only exposed areas. Look at your scalp, behind the ears, between the toes, under the nails and the soles of your feet. Ask a partner, family member or hairdresser to mention anything they notice on your scalp or back. A new dark streak in a nail, a non-healing patch on the foot, or a changing mark anywhere on the body deserves clinical assessment.

Warning signs that should not wait

The ABCDE guide is useful for pigmented spots. Look for asymmetry, an irregular border, uneven colour, a diameter that is growing or larger than many other moles, and evolution – any change in size, shape, colour, surface or sensation.

The most useful signal is often change. A spot that starts to itch, bleed, crust, become raised, feel tender or look different from its neighbours should be checked. The “ugly duckling” sign is equally valuable: if one mole looks noticeably unlike the rest, trust that observation and arrange an appointment.

Not all melanomas match the textbook picture. Nodular melanoma can grow quickly as a firm, raised bump and may be pink, red, brown, black or skin-coloured. It may not be wide or irregular. A new lesion that is growing over weeks is a reason to seek prompt medical advice, even if it does not look like a typical mole.

Do not try to diagnose melanoma from online images, and do not wait for pain. Early melanoma may cause no discomfort at all.

Reducing your melanoma risk in daily life

Sun protection works best as a routine rather than a response to getting burnt. Use several measures together: seek shade where possible, wear covering clothing and a broad-brimmed hat, use wraparound sunglasses, and apply a broad-spectrum SPF 50+ sunscreen correctly.

Sunscreen is not a pass to stay outside longer. Apply it generously to exposed skin before going outdoors and reapply at least every two hours, as well as after swimming, sweating or towel-drying. In practical terms, sunscreen needs to be paired with clothing and shade, particularly during long days outdoors.

Workplace protection deserves the same attention as weekend protection. If you work outside, discuss shade, protective uniforms, breaks and sunscreen access with your employer. Keeping a hat and sunscreen in the ute, work bag or near the front door can make protection easier to maintain. For children, model the habits you want them to keep as adults.

When should you book a skin check?

Book a skin check promptly if you notice a new, changing, bleeding or unusual lesion. The same applies if you have a sore that does not heal, a persistent dark mark under a nail, or a spot that simply concerns you. Every minute counts when a potentially serious skin cancer is being assessed.

If you have a previous melanoma, a strong family history, many atypical moles, significant sun exposure, a weakened immune system, or a history of tanning bed use, ask your GP or a qualified skin cancer clinician how often you should be examined. There is no single schedule that suits every Australian. Your risk profile, age, past findings and ability to monitor your own skin all influence the right plan.

A professional assessment may involve a full-body examination using a dermatoscope, a handheld device that helps clinicians see structures beneath the skin surface. If a lesion is suspicious, the clinician may recommend removal or a biopsy. This does not mean it is definitely melanoma. It means the only safe way to know is to examine the cells properly.

Make observation a habit, not a source of worry

A monthly self-check in good light can help you learn what is normal for your skin. Use a mirror for your back and legs, and keep a note of spots you want to watch. Photos can be helpful for tracking a visible change, but they should support, not replace, a clinical review.

You do not need to be certain that a spot is dangerous before booking an appointment. Knowledge can save your life, but so can acting on uncertainty. If something on your skin is new, changing or does not feel right, arrange a skin check and get a clear answer.