Why can pigmentation get darker in summer?

Pigmentation occurs when excess melanin develops within certain areas of the skin. Melanin is the pigment responsible for skin colour and is produced as part of the skin’s natural defence system. Various factors can trigger increased melanin production including sun exposure, hormones, inflammation and genetics.

Why summer makes pigmentation more noticeable

One of the most common reasons pigmentation worsens during summer is increased exposure to UV radiation. When the skin is exposed to sunlight, melanocytes are stimulated to produce more pigment. In people who are prone to pigmentation disorders, this response can be exaggerated, causing existing patches to become darker and more noticeable.

Which conditions are most affected?

Melasma is particularly sensitive to sunlight and often becomes more prominent during warmer months. Post-inflammatory pigmentation left behind by acne, eczema or skin injuries may also darken with sun exposure. Age spots and freckles can also become more visible.

Will pigmentation fade on its own?

Some forms of pigmentation gradually improve over time, especially if the original trigger is no longer present. However, other types can persist for years and may repeatedly worsen following sun exposure. This is why managing the underlying trigger is often just as important as treating the pigmentation itself.

How can you prevent it from getting worse?

Consistent sun protection is one of the most effective ways to minimise pigmentation. Wearing sunscreen, seeking shade and avoiding unnecessary UV exposure can all help. In some cases, additional treatments such as laser treatment may be recommended to reduce pigmentation and improve skin tone.

Final thoughts

Pigmentation often becomes darker during summer because sunlight stimulates melanin production. Consistent sun protection is vital, not just to minimise the chances of developing skin cancer, but to prevent pigmentation from becoming more noticeable.