The ABCDE of Skin Checking: A Simple Guide to Spotting Changes Early
Your skin changes over time. Some changes are harmless, but others deserve attention. The ABCDE skin checking method is a simple way to notice unusual moles or spots early, so you know when to book a professional skin check.
Why skin checking matters
Skin cancer can appear as a new spot, a changing mole, a sore that does not heal or a mark that looks different from the rest of your skin. In Australia, where UV levels can be high, regular skin awareness is an important part of everyday sun safety.
The goal of skin checking is not to diagnose yourself. It is to notice changes early and get them assessed by a qualified health professional. A simple monthly habit can help you understand what is normal for your skin, so unusual changes stand out sooner.
Skin checking and sun protection work together. Checking helps you notice change. Sun-smart clothing, sun hats, shade, sunglasses and sunscreen help reduce UV exposure in daily life.
If a spot is new, changing, bleeding, itchy, painful, crusting or simply feels unusual to you, do not wait. Book a skin check with your GP, dermatologist or skin cancer clinic.
What is the ABCDE method?
The ABCDE method is a simple guide used to help identify warning signs that may be seen in melanoma. It stands for Asymmetry, Border, Colour, Diameter and Evolving.
It is useful because it gives you a clear checklist when looking at moles or pigmented spots. However, it is not perfect. Some skin cancers do not follow every rule, and some harmless spots can look unusual. That is why professional assessment matters.
Use ABCDE as a reminder, not a diagnosis.
The ABCDE of skin checking
Asymmetry
Look for spots where one half does not match the other. If you imagine drawing a line through the middle, both sides should look fairly similar. A mole that looks uneven or unbalanced may need checking.
Border
Watch for edges that look irregular, notched, blurred, scalloped or poorly defined. A normal mole often has a more even border, while suspicious spots may spread unevenly at the edges.
Colour
Notice whether a spot has multiple colours or uneven shades. Look for areas of brown, black, red, white, grey or blue within the same spot, or a colour pattern that looks different from your other moles.
Diameter
Be aware of spots that are growing or are larger than about 6 mm. Size alone does not tell the full story, because melanoma can sometimes be smaller. A small spot that is changing should still be checked.
Evolving
Evolving means change. This is one of the most important things to look for. Book a skin check if a spot changes in size, shape, colour, height, texture or sensation, or if it starts to itch, bleed, crust or feel painful.
Remember the “ugly duckling” sign
Another simple way to check your skin is to look for the spot that does not match the others. Many people have a pattern to their moles. If one mole looks noticeably different from the rest, it may be worth showing to a doctor.
This is sometimes called the “ugly duckling” sign. It is especially helpful if you have many moles, freckles or sun spots.
How to check your skin at home
A good skin self-check does not need to be complicated. Choose a well-lit room, use a full-length mirror and a hand mirror, and take your time.
Simple skin checking routine
- Start with your face and scalp: check your forehead, nose, lips, ears, neck and hairline. Use a mirror or ask someone to help with your scalp.
- Check your upper body: look at your chest, stomach, shoulders, back, underarms and sides.
- Look at your arms and hands: include elbows, palms, between fingers and under nails.
- Check your lower body: look at your thighs, knees, shins, calves and ankles.
- Do not forget hidden areas: check the soles of your feet, between toes, under nails and areas normally covered by clothing.
- Take photos if helpful: a clear photo can make it easier to notice whether a spot changes over time.
Try to check your skin the same way each time. This makes it easier to notice new spots or changes.
When should you book a professional skin check?
Book a professional skin check if you notice any ABCDE warning sign, a new spot that worries you, or a sore that does not heal. You should also seek advice if a mole bleeds, itches, becomes tender, crusts or changes quickly.
You may need more regular skin checks if you have a personal or family history of skin cancer, many moles, fair skin, a history of sunburn, a weakened immune system or regular outdoor exposure. Your GP or dermatologist can advise what schedule is right for you.
A new mole, mark or lesion that appears and looks different from your usual skin pattern.
A spot that changes in size, colour, shape, texture, height or sensation.
A sore, scab, rough patch or bleeding area that does not heal normally.
Skin checking is for every skin tone
Skin cancer can affect people of all skin tones. It may be less common in deeper skin tones, but it can still happen and may be diagnosed later if warning signs are missed.
If you have deeper skin, pay special attention to areas such as palms, soles, nails, between toes and areas not usually exposed to the sun. Any new or changing spot deserves attention.
How sun protection supports skin health
Skin checking helps you notice changes. Sun protection helps reduce UV exposure before damage builds. Both matter.
A strong daily routine starts with coverage: UPF 50+ clothing, a broad-brim sun hat, sunglasses and shade when UV levels are high. Sunscreen should be used on exposed skin that clothing and hats do not cover.
Aurelia Sun was created for women who want sun-smart dressing to feel elegant, easy and part of daily life. Our focus is wearable UPF50+ womenswear, made for the Australian sun.
What to wear for a skin-conscious sun routine
The best sun protection is the routine you will actually follow. Choose clothing and hats that feel comfortable, breathable and easy to wear.
For everyday sun exposure
Long sleeves, relaxed coverage and a wide-brim hat can make daily outdoor moments easier. This includes walks, errands, school runs, outdoor dining and weekend plans.
For beach and travel days
Pack UPF clothing, a hat, sunglasses and sunscreen together. This makes it easier to stay protected when you are away from home, near water or outside for longer than expected.
For active days
Breathable fabric, secure hats and coverage that moves with you are especially helpful for walking, sport, gardening and long outdoor activity.
To understand how Aurelia Sun approaches fabric protection, visit our Testing Process. You can also learn more about our skin-health purpose on our Dermatologist Panel, Our Story and Sustainability & Impact pages.
Helpful external resources
For more information on skin checking and melanoma warning signs, these independent resources are useful:
- Cancer Council Australia: Check for signs of skin cancer
- American Academy of Dermatology: ABCDEs of melanoma
- Melanoma Institute Australia: Checking your skin
- Cancer Council NSW: Checking for skin cancer
Frequently asked questions
What does ABCDE stand for in skin checking?
ABCDE stands for Asymmetry, Border, Colour, Diameter and Evolving. It is a simple guide to help notice warning signs in moles or spots.
How often should I check my skin?
Many people choose to check their skin monthly. If you are at higher risk of skin cancer, ask your GP or dermatologist how often you should have professional skin checks.
Is a mole always dangerous if it is larger than 6 mm?
No. Size alone does not diagnose skin cancer. However, a mole that is large, growing or changing should be checked by a qualified health professional.
What is the most important ABCDE warning sign?
Evolving is especially important because change can be a warning sign. If a spot changes in size, shape, colour, height, texture or sensation, book a professional skin check.
Can skin cancer appear where the sun does not shine?
Yes. Skin cancer can appear on areas that are not regularly exposed to the sun, including soles, nails and covered areas. That is why a full-body skin check is important.
Does UPF clothing replace skin checks?
No. UPF clothing helps reduce UV exposure on covered skin, but it does not replace regular skin awareness or professional checks when something changes.
Medical disclaimer: This article is for general information only and is not medical advice. It does not diagnose, treat or replace professional medical care. If you notice a new, changing or unusual spot, speak with a GP, dermatologist or qualified skin cancer clinician.