A mole on your back, scalp or the sole of your foot can change for months without being noticed. That is why hidden mole checks matter. Skin cancer does not only appear on the areas you see in the mirror each morning, and waiting until a spot becomes painful, raised or bleeding can mean waiting too long.

Australia has one of the highest rates of skin cancer in the world. Regular self-checks are useful, but they have a clear limitation: you cannot properly examine every part of your own skin. Knowing where hidden lesions occur, what changes to look for and when to arrange a professional skin check can help you act sooner.

Why hidden mole checks deserve attention

Most people naturally focus on their face, arms, chest and lower legs. These sites receive plenty of sun and should be checked. But melanoma and other skin cancers can develop in places that are difficult to inspect, including the scalp, ears, back, buttocks, groin, between the toes and beneath nails.

Some of these areas are regularly exposed to ultraviolet radiation. The scalp, for example, may receive significant sun exposure in people with thinning hair, a receding hairline or short hair. Other sites may be covered most of the time. Skin cancer can still occur there, particularly melanoma. A hidden location is not a reason to dismiss a new or changing mark.

The concern is not that every mole is dangerous. Most moles are harmless. The concern is that a lesion you cannot see easily may not be monitored often enough to detect a meaningful change. Early detection gives treatment the best chance of being straightforward and successful.

The body areas people commonly miss

A full skin check is not just a quick look at the obvious places. During your own checks, use a well-lit room, a full-length mirror and a hand mirror where possible. Ask a partner, family member or trusted friend to help with areas you cannot inspect properly.

Scalp, hairline and behind the ears

Part your hair in sections and check the scalp systematically. A hairdresser may occasionally spot a concerning area, but this is not a substitute for a clinical assessment. Pay attention to a new scaly patch, a sore that does not heal, a dark mark that is changing, or a spot that repeatedly bleeds or crusts.

Check the hairline, the tops and backs of the ears, and the skin behind the ears. These are easy places to miss when applying sunscreen and when looking in the mirror.

Back, shoulders and the back of the legs

The back is one of the most difficult areas to assess alone and is a common site for melanoma in men. Use mirrors if you can, but practical help from another person is often more reliable. Ask them to look for a mole that is new, changing, noticeably darker than your other moles or simply looks different.

Also check the backs of your shoulders, upper arms, calves and thighs. These areas can receive intermittent intense sun exposure, such as during weekends at the beach, sport or outdoor work.

Soles, toes, nails and palms

Melanoma can develop on the soles of the feet, palms and under the nails. This includes people with darker skin tones, for whom melanoma may be more likely to occur on the hands, feet or nails than on heavily sun-exposed skin.

Look at the soles, between the toes and around the toenails. A dark line or patch under a nail should be assessed if it is new, widening, irregular, changing, or extending onto the surrounding skin. Do not assume it is a bruise, fungal infection or damage from tight shoes without having persistent or unusual changes checked.

Buttocks, groin and genital skin

These areas can feel awkward to examine or raise at an appointment, but clinicians assess them professionally and without judgement. Report any new pigmented spot, persistent sore, bleeding area, lump or lesion that changes in size, shape or colour. A full skin check may include these sites when appropriate, particularly if you have noticed a change.

What changes should prompt a booking?

The ABCDE guide can help you notice changes in pigmented lesions. Look for asymmetry, an irregular border, varied colour, a diameter that is growing, and evolution – any change over time. Evolution is particularly useful because a mole does not need to be large to be concerning.

Also use the “ugly duckling” principle. If one spot looks noticeably different from the rest of your moles, arrange an assessment. This may be a very dark lesion among lighter moles, a new pink or red spot, or a mole with a different shape or pattern.

Not all skin cancers look like dark moles. Basal cell carcinomas and squamous cell carcinomas may appear as a pearly bump, a scaly red patch, a crusted lesion, or a sore that heals and returns. On the scalp, face and ears, these signs can be mistaken for irritation or a stubborn dry patch.

Book a skin check promptly if you notice a spot that is changing, itching persistently, bleeding, crusting, painful or not healing. A rapidly changing lesion, an unexplained dark streak under a nail, or a lesion that bleeds without being knocked should not be watched for weeks in the hope it settles.

A self-check is helpful, but it is not a diagnosis

Self-examination helps you become familiar with your skin. For many adults, a monthly check is a sensible routine, especially after a shower or while getting dressed. Photographing a spot can sometimes help you notice whether it changes, but lighting, angles and image quality can be misleading. Photos should never delay a clinical review.

A clinician can examine areas that are difficult to see and assess lesions using tools such as dermoscopy. If a spot is suspicious, they may recommend monitoring, a biopsy or removal. The right next step depends on the lesion, its location and your individual risk factors.

There is no one screening schedule that suits every Australian. Your doctor may recommend more frequent checks if you have had melanoma or other skin cancers, have many moles, a strong family history, fair skin that burns easily, a weakened immune system, or substantial lifetime sun exposure. Outdoor workers, surfers, golfers, gardeners and anyone who has experienced repeated sunburn should discuss their personal risk rather than relying on a calendar reminder alone.

Make a full-body check part of your prevention plan

Sun protection and skin checks work together. Seek shade, wear protective clothing, use a broad-spectrum, water-resistant SPF50+ sunscreen correctly, and reapply it as directed when outdoors. Do not overlook the scalp, ears, neck, tops of the feet and lips. A broad-brimmed hat protects more of the head and neck than a cap, although sunscreen is still needed on exposed skin.

If you ask someone to help check hidden areas, be specific about what you need them to look for: a new spot, a change in an existing mole, an unusual colour pattern, or a sore that persists. Keep the conversation simple and practical. The aim is not to diagnose each other but to notice changes early enough to arrange professional care.

A professional skin check is especially worthwhile if it has been a long time since your last examination, you have noticed something you cannot inspect properly, or you are unsure whether a mark has changed. Skin Cancer Australia encourages timely assessment because uncertainty is not something you need to carry alone.

The mole you cannot easily see is still part of your skin health. Ask for help checking it, trust a change that does not feel right, and book a clinical assessment rather than waiting for clearer warning signs. Every minute counts when early action can save your life.