Melanoma Prevention and Sun Protection

Melanoma is one of the most dangerous skin cancers, yet also one of the most preventable. Most cases are linked to ultraviolet radiation — which means you can realistically lower a large part of the risk. In this article we look at the risk factors for melanoma and how to protect your skin from the sun in practice, without giving up an active outdoor life.

What actually causes melanoma?

The single most important avoidable factor is UV radiation — from both the sun and tanning beds. UV damages the DNA in skin cells, and accumulated damage can lead to cancer years later. Sunburns are especially harmful, particularly those in childhood and adolescence — a single severe, blistering burn counts for more than a mild, even tan.

It helps to understand one thing: a tan is not a sign of health. It is the skin's defensive response to damage. Every patch of redness and every peel after sun exposure is a sign that harm occurred at the cellular level.

Risk factors worth knowing

The risk of melanoma is not evenly distributed. Greater vigilance is warranted for people who have one or more of the following:

• Fair complexion — pale skin, freckles, red or blond hair, light eyes. These are the lower Fitzpatrick phototypes (I–II), which burn easily and tan poorly.
• Many moles — more than 50 moles on the body, and especially the presence of atypical moles (unusual shape, colour, or large size).
• Family history of melanoma — a parent or sibling who has had it raises your risk.
• Past sunburns — particularly during childhood.
• Use of tanning beds — especially if started before the age of 30.
• Weakened immune system — for example after an organ transplant or during immunosuppressive treatment.
• A previous melanoma — people who have already had one are at higher risk of another.

If you recognise several of these factors in yourself, it is not a reason to panic — it is a reason for regular observation and sensible protection.

Sun protection in practice

Effective protection is not a single act but a set of habits that together significantly reduce the dose of UV reaching your skin.

Sunscreen — how to use it well

• Choose a broad-spectrum sunscreen (UVA and UVB protection) with SPF 30 or higher, and SPF 50+ for prolonged exposure.
• Apply enough — an adult needs about a teaspoon for the face and neck and roughly a shot glass (30 ml) for the whole body. Most people apply too little, so the real protection is lower than the label suggests.
• Apply 15–30 minutes before going out in the sun.
• Reapply every 2 hours, and also after swimming, heavy sweating, or towel-drying.
• Don't forget the easily missed spots: ears, back of the neck, tops of the feet, hairline, and lips (use a lip balm with SPF).

Sunscreen is not a "pass" for unlimited time in the sun. It is one part of protection, not the whole of it.

Shade, time of day, and the UV index

The simplest and cheapest protection is avoiding the sun during peak hours. In temperate latitudes radiation is strongest between 11 a.m. and 3 p.m. Check the UV index in your weather forecast — when it reaches 3 or more, it is worth reaching for protection. A handy rule of thumb is the shadow test: if your shadow is shorter than you are tall, the sun is strong and shade is the better choice.

Clothing, hat, sunglasses

Fabric is one of the most effective barriers against UV. A light long-sleeved shirt, a wide-brimmed hat (covering the ears and neck), and UV-blocking sunglasses protect you better and more comfortably than sunscreen alone. There is also clothing with a declared UPF protection factor, useful for long stretches outdoors.

Tanning beds — there is no "safe" tan

Tanning beds emit concentrated UV radiation and have been classified by the International Agency for Research on Cancer as a Group 1 carcinogen — the same category as tobacco smoke and asbestos. Using tanning beds, especially at a young age, clearly increases the risk of melanoma.

There is no such thing as a "healthy" tanning-bed tan. If you want a tanned look, self-tanning products (colouring cosmetics) that do not use UV are far safer.

What about vitamin D?

A common argument against protection goes: "but I need the sun for vitamin D." It is true that the skin produces vitamin D under UVB, but covering your needs only takes short, daily exposures of small areas of skin — not hours of sunbathing or burns. In temperate climates, especially during the autumn and winter months, a sensible and safe solution is vitamin D supplementation, ideally chosen together with your doctor. That way you don't have to choose between adequate vitamin D and protection from melanoma.

Protecting children — a lifelong investment

Skin in childhood is especially vulnerable, and burns at that age have a large impact on adult risk. That is why it is worth:

• Keeping infants under 6 months out of direct sunlight (shade, clothing, a pram canopy).
• Combining sunscreen with clothing, a hat, and sunglasses for older children.
• Paying attention to protection during play near water and on snow, where reflected rays amplify the UV dose.
• Building the habit — a child who learns to protect their skin naturally will keep that habit into adulthood.

Prevention also means regular monitoring

Sun protection lowers risk, but it does not eliminate it. The second pillar of prevention is early detection — melanoma caught at an early stage is, in the vast majority of cases, curable. That is why it is worth performing a skin self-exam every month and showing any doubtful moles to a dermatologist. The ABCDE rule helps here, as does knowing what melanoma looks like and its first symptoms.

This is where J-Skin comes in. The app lets you photograph moles at regular intervals, compare photos from different months, and catch slow changes that are easy to miss with the naked eye. You can set reminders so that monitoring doesn't get lost amid everyday life.

The key points in brief

• The main risk factor for melanoma — UV radiation and sunburns — is largely avoidable.
• Combine a broad-spectrum SPF 30–50+ sunscreen with shade, clothing, a hat, and sunglasses.
• Avoid the sun between 11 a.m. and 3 p.m. and give up tanning beds entirely.
• Maintain vitamin D sensibly, ideally through supplementation chosen with your doctor.
• Protect children's skin — it is a lifelong investment.
• Monitor your moles regularly and don't hesitate to have worrying changes checked.

If you want to know how often to take follow-up photos, see our guide on how often to photograph your moles. Remember, though, that no app replaces a dermatologist's examination — J-Skin helps with observation, but always leave the final assessment to a doctor.