Learn the signs of melanoma with the simple ABCDE checklist. Spot skin cancer early, know when to act, and get a fast dermatologist review.
FindCare Editorial Team
Hebra Journal
Melanoma is the most serious form of skin cancer, and learning the signs of melanoma is one of the most powerful things you can do to protect yourself. The earlier melanoma is found, the more treatable it usually is. Yet many people put off getting a changing mole checked, often because they aren't sure what to look for or assume skin cancer "won't happen to them." This guide walks you through the warning signs, the dermatologist-trusted ABCDE checklist, and exactly when to seek help.
The timing matters. In May 2026, Cancer Research UK reported that melanoma cases in the UK have hit a record high, with more than 20,000 people diagnosed in a single year, and that figure is projected to rise to around 26,500 a year by 2040. The encouraging news? Nearly 9 in 10 melanoma cases are linked to too much UV radiation, which means most are preventable, and the vast majority are highly treatable when caught early.
Melanoma develops in melanocytes, the cells that give skin its colour. It can appear as a new spot or grow from an existing mole, and unlike many other skin cancers, it can spread to other parts of the body if left untreated. That is why spotting the early signs of melanoma is so important.
The good news is that melanoma often shows visible changes on the surface of the skin before it becomes dangerous. A mole that looks different from your others, or one that has started to change, is your skin's way of flagging that something may need attention. Knowing what "different" looks like turns a vague worry into a clear, actionable decision.
Melanoma can affect anyone, including people with pale skin, lots of moles, a family history of skin cancer, or a history of sunburn and sunbed use. But it can also develop in people with none of these risk factors, which is exactly why regular self-checks matter for everyone.
Dermatologists and the NHS recommend the ABCDE checklist as a simple way to remember the key warning signs of melanoma. Run through these five points whenever you check a mole:
A normal, healthy mole tends to be stable, symmetrical, one even colour, and small. If a spot ticks one or more of the ABCDE boxes, it's worth getting it reviewed.
The ABCDE checklist covers the classic signs of melanoma, but it isn't the whole picture. Pay attention to any of these changes as well:
A mole or mark that bleeds, crusts, itches, or doesn't heal can be an early warning sign. So can a spot that suddenly stands out as the "ugly duckling," looking obviously different from every other mole on your body. New moles appearing in adulthood, or a dark streak under a fingernail or toenail, also deserve a closer look.
Importantly, not all melanomas are dark. Some are pink, red, or skin-coloured, which is why a changing or unusual spot of any colour should be checked rather than dismissed. Rebecca Dance, a mum-of-two from Berkshire, was diagnosed with stage 1 melanoma at 39 after noticing a suspicious mole on her back. As she put it, there's a perception that skin cancer only happens to people who sunbathe or use sunbeds, but it can happen to anyone, and getting checked early may have saved her life.
Related read: when to see a dermatologist
Aim to check your skin roughly once a month. Use a well-lit room and a full-length mirror, plus a hand mirror for areas you can't easily see, such as your back, scalp, and the soles of your feet. Ask a partner or family member to check hard-to-reach spots. Taking dated photos of any moles you're unsure about makes it much easier to notice changes over time.
If you spot any of the signs of melanoma described above, don't wait. Contact your GP or a dermatologist promptly. Most changes turn out to be harmless, but only a professional can tell the difference, and early review is always the safest choice. The challenge in the UK is that dermatology waiting times can stretch from several weeks to many months, which is exactly the kind of delay that early detection can't afford.
Related read: dermatologist waiting times UK
Knowing the signs of melanoma is only useful if you act on them. If a mole looks different, has started to change, or simply doesn't feel right, the smartest move is to get it reviewed quickly rather than hoping it settles on its own.
Hebra makes that first step faster and less stressful. Our skin health triage app analyses your skin concern and connects you directly to dermatologists, helping you skip the long waits that can delay diagnosis. If you've noticed a changing mole or a spot that worries you, don't sit on it. Visit www.hebra.health to get your skin checked and gain peace of mind, because when it comes to melanoma, early really does matter.
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