Melanoma: warning signs to check with a dermatologist

Melanoma is a skin cancer that develops from pigment-producing cells, either within an existing mole or on skin that looked perfectly normal before. One fact matters more than any other, and it is reassuring without being a reason to relax: caught early, melanoma is very treatable. That is exactly why watching your skin is worth the small effort. In Luxembourg, any pigmented spot that is changing shape, colour or size should be shown to a dermatologist rather than kept for the next routine check-up.

Look for change, not just colour

The most useful habit is not hunting for "the" suspicious mole among dozens of ordinary ones, but noticing the one that behaves differently from the rest. Most people carry several dozen moles that broadly resemble each other, like a family of similar shapes. The real warning sign is the "ugly duckling": a lesion that looks nothing like your other moles, or one that, compared with a photo taken a few months earlier, has visibly changed.

That change can show up as size that keeps growing, colour that becomes uneven or darker in places, or a surface that turns irregular to the touch. Itching, bleeding after a light knock, or a spot that will not heal are also signals worth acting on rather than watching indefinitely.

The ABCDE rule: a simple mental checklist

Dermatologists rely on a five-letter framework that is easy to remember and to apply yourself in front of a mirror.

• A for Asymmetry: one half of the mark does not match the other, unlike a typical mole, which tends to be round or oval and symmetrical.
• B for Border: edges are ragged, notched or poorly defined, instead of smooth and continuous.
• C for Colour: several shades sit within the same lesion — light brown, dark brown, black, sometimes reddish or whitish patches.
• D for Diameter: a size above roughly 6mm, about the width of a pencil eraser, deserves closer attention, though smaller lesions can occasionally be suspicious too.
• E for Evolving: the single most important sign. A mole that is changing — in size, colour, texture or symptoms — should be shown to a doctor, whether or not it ticks any of the other boxes.

No single letter is conclusive on its own; it is the combination, and above all a change over time, that should prompt a consultation.

Self-checking your skin, made simple

Getting into the habit of checking your skin once or twice a year, using a mirror for hard-to-see areas such as the back, scalp and soles of the feet, lets you catch changes long before they become obvious to people around you. Photographing your moles with a smartphone, keeping something for scale such as a ruler in the frame, gives a far more reliable comparison from one year to the next than memory alone.

Do not forget the spots you rarely check yourself: scalp, back, backs of the legs, between the toes. Asking someone close to you to glance at these blind spots, or booking a dermatologist directly, is a useful addition to self-checking.

Who should have regular dermatology check-ups

Some people benefit from a regular dermatology follow-up rather than waiting for a worrying sign to appear. This applies to those with fair skin that burns easily and tans little or not at all; to those who had significant sunburns, particularly in childhood; to those with a high number of moles (above roughly fifty) or moles of unusual shape; and to those with a personal or family history of melanoma, especially a first-degree relative who has been affected.

For these profiles, an annual dermatology check, sometimes supported by dermoscopy (examining the skin under magnification), makes it possible to track lesions over time and catch any suspicious change early.

Sun protection: a habit worth building for everyone

Exposure to ultraviolet light, whether from the sun or from tanning beds, remains the main risk factor you can actually control. A few simple habits cut this risk day to day: seeking shade when the sun is strongest, wearing a hat, sunglasses and covering clothing, and applying a high-factor sunscreen to exposed skin, reapplying it regularly. Tanning beds increase melanoma risk, particularly when use starts young, and are best avoided altogether.

Sun protection matters especially for children: repeated sunburns before adulthood weigh heavily on future risk.

Seeing a dermatologist in Luxembourg: quick and direct

In Luxembourg, you can book a dermatologist directly, with no obligatory referral from a GP first, which makes a fast consultation possible as soon as a lesion raises a question. Consultations and any follow-up examinations prescribed are covered by the National Health Fund (CNS) under the usual reimbursement conditions. You can find a dermatologist near you and book an appointment directly on Doctipro as soon as a mole catches your attention — a reassuring visit beats a lingering worry every time.