A spot that has changed since last summer deserves more than a quick glance in the bathroom mirror. Documenting changing skin lesions can give you and your clinician a clearer picture of what is happening, especially when the change is subtle, gradual or difficult to describe. It is a useful aid, but it must never become a reason to wait on a lesion that concerns you.
Australia has some of the world’s highest rates of skin cancer. Melanoma, basal cell carcinoma and squamous cell carcinoma can look very different from one person to the next. A changing mole is not the only warning sign. A sore that does not heal, a scaly patch, a persistent crust or a new dark streak under a nail may also need prompt clinical assessment.
Why documenting changing skin lesions helps
Our memory is unreliable when it comes to small changes in size, shape and colour. A lesion may seem “about the same” until a photograph taken six weeks earlier shows that its border has become uneven, its colour has deepened or it has grown.
Clear records can help a GP, dermatologist or skin cancer clinician understand the timeline. They may ask when you first noticed the spot, whether it has bled, and how quickly it changed. A dated image and a short note can make those answers more accurate.
This is particularly useful for people with many moles, previous skin cancer, a strong family history of melanoma, fair skin that burns easily, or years of high UV exposure. Outdoor workers, surfers, gardeners and anyone who has spent long periods in the sun may have areas that are hard to track, including the scalp, back, shoulders and lower legs.
However, photos cannot diagnose skin cancer. Lighting, camera quality and image angles can alter how a lesion looks. Some concerning lesions do not change in an obvious way, while others may change between photos. If a spot is new, evolving or worrying, book a skin check rather than waiting to collect more evidence. Every minute counts when early assessment is needed.
What changes should prompt a skin check
The ABCDE guide is a helpful starting point for pigmented lesions. Look for asymmetry, an irregular border, uneven colour, a diameter that is growing, and evolution – any change in appearance, sensation or behaviour. Evolution is often the most useful sign because a lesion does not need to be large or traditionally dark to be concerning.
Also watch for the “ugly duckling” sign. This is a spot that looks noticeably different from the others on your skin. It may be darker, pinker, raised, shinier or simply unlike your usual moles.
Not all skin cancers are brown or black. Basal cell carcinomas can appear as pearly or shiny bumps, non-healing sores, or pink patches. Squamous cell carcinomas may look scaly, thickened, tender or crusted. On the lips, ears, face and scalp, persistent rough spots deserve attention, particularly for people with substantial sun exposure. A changing patch in skin of colour can be less visibly red, so new darkening, thickening, ulceration or a sore that persists should not be dismissed.
Arrange an urgent appointment if a lesion is bleeding without clear injury, painful, rapidly enlarging, ulcerated, repeatedly crusting, or changing over days or weeks. A dark band under a fingernail or toenail that widens, becomes uneven, or extends onto surrounding skin should also be assessed promptly. Do not attempt to treat a suspicious lesion with over-the-counter wart, acne or antiseptic products before it has been examined.
How to take useful, consistent photos
You do not need specialist equipment. A mobile phone can be enough if you use a consistent approach. The goal is not a perfect image. It is a reliable record that shows whether a spot may be changing.
Take photographs in good natural light where possible, avoiding harsh shadows and coloured bathroom lighting. Clean the camera lens first. Ask a partner, family member or trusted friend to help with difficult areas such as your back, scalp and the backs of your legs. If nobody can help, use a mirror carefully, but do not delay an appointment because you cannot photograph an area well.
For each lesion, take both a wider image and a close-up. The wider image shows its location on the body. The close-up captures detail. Include a small ruler or measuring tape beside the lesion if practical, but do not let the object cover any part of it. Keep the camera at a similar distance and angle each time.
A useful photo record should include these details:
- the date the image was taken
- the body site, using a clear description such as “left upper back” or “right calf”
- an approximate measurement in millimetres
- symptoms such as itch, tenderness, bleeding, crusting or non-healing
- changes you have noticed, including a new colour, raised area or faster growth.
Avoid filters, portrait mode, flash when it causes glare, and image editing. These can hide texture or alter colour. Keep the original files rather than relying only on screenshots or photos shared through messaging apps.
Choose the right interval
There is no single safe schedule for photographing every lesion. It depends on your personal risk, the type of lesion and what your clinician has advised. For a spot already assessed as low risk, a clinician may recommend a particular review interval. Follow that plan rather than setting your own.
For a new lesion that you have noticed but have not yet had checked, do not make monthly photos a substitute for booking. If it is changing, symptomatic or stands out from other spots, seek an appointment now. A photo taken today can still be valuable at that visit.
Whole-body skin checks are also worthwhile. Examine your skin regularly in a well-lit room, including the scalp, ears, neck, underarms, soles, between the toes, buttocks and genital area. These sites are easy to overlook. Use a hand mirror for hard-to-see areas, or ask someone you trust to assist. People with a history of melanoma or multiple atypical moles may need clinician-led surveillance and specialised total-body photography.
Keep the record private and easy to use
Skin photographs are sensitive health information. Store them in a password-protected folder or secure photo album on your mobile. Consider a simple note in the same place with dates and symptoms. If you use a paper body map, keep it somewhere private and bring it to your appointment.
Do not rely on internet image searches or social media comparisons. Skin cancer can resemble benign conditions, and harmless spots can resemble alarming images online. A trained clinician may examine a lesion with a dermatoscope, compare it with other lesions on your skin and decide whether monitoring, treatment or a biopsy is appropriate.
When photos are not enough
A lesion should be assessed in person when it is suspicious, even if your photos appear unchanged. Some melanomas develop without dramatic visible movement, and certain skin cancers are more noticeable by texture than colour. A firm, tender or persistent scaly area may require examination despite looking similar in images.
Be especially cautious if you are immunosuppressed, have had an organ transplant, take medicines that suppress immunity, have previously had skin cancer, or have a close relative diagnosed with melanoma. Your threshold for seeking a skin check should be lower. The same applies to lesions on the face, ears, lips, scalp, hands, feet and nails, where early diagnosis can make treatment simpler.
If you are unsure whether a change is significant, treat uncertainty as a reason to book. A GP, dermatologist or dedicated skin cancer clinic can assess the lesion and advise whether it needs monitoring or removal. Bring your photographs, but let the clinical examination lead the decision.
Your photo record is not about becoming an expert in skin cancer. It is about noticing your skin, capturing changes clearly and acting without delay when something does not look right. Knowledge can save your life, and a timely skin check is the next practical step.