Freckles and hyperpigmentation are often grouped together, even though their origin and behaviour are fundamentally different. Understanding this difference helps you better understand your skin – and why not all pigmentation should be treated in the same way.

Freckles are a genetic form of pigmentation linked to variants of the MC1R gene. They are most commonly seen in fair skin and are often associated with lighter or red hair, although they can occur in all skin types.

Unlike many other forms of pigmentation, freckles are not caused by skin damage or inflammation. They are part of the skin’s natural biology.

Skin colour is determined by melanin, which exists in two main forms:

• Eumelanin, which is darker and provides more effective protection
• Pheomelanin, which is lighter and more reddish

The MC1R gene regulates the balance between these two types. When the gene is more active, the skin produces more eumelanin. Certain genetic variants, however, shift production towards pheomelanin.

This is why freckles tend to appear in specific patterns, not because there are more melanocytes, but because certain areas produce more pigment than others.

Freckles respond strongly to UV exposure. When the skin is exposed to sunlight, melanin production increases as a protective response. In freckled skin, this response is uneven, leading to the darkening of small, concentrated areas.

This is why freckles typically become more visible in summer and fade during winter when UV exposure decreases.

Freckled skin is not just visually distinct,  it also functions differently on a biological level. Eumelanin helps protect the skin by absorbing UV radiation and neutralising free radicals.

Pheomelanin, on the other hand, offers less protection. Under UV exposure, it may even contribute to oxidative stress.

Because of this, freckled skin tends to burn more easily, react more sensitively to external stress and be more prone to UV-induced damage.

The MC1R gene does not only influence pigmentation. It is also involved in regulating inflammatory responses in the skin. Certain variants are associated with a higher tendency toward low-grade inflammation.

This may show up as increased sensitivity, redness and uneven skin tone. This does not mean freckled skin is weaker, but it does mean that it benefits from a slightly different approach.

Freckles are a genetic trait, which means they cannot be prevented or permanently removed. Their appearance can, however, be influenced.

The most important factors are daily sun protectio, antioxidant support and maintaining a calm and balanced skin barrier.

Unlike melasma or post-inflammatory pigmentation, freckles are not a condition that needs to be “corrected”, but rather a natural expression of how the skin functions.

Freckles differ from other types of pigmentation in a few key ways:

• They are genetic, not a result of damage
• They fade naturally when UV exposure decreases
• They are not directly linked to inflammation in the same way as post-inflammatory pigmentation

If you want to understand other types of pigmentation, such as melasma or sun spots, you can read more here: A Guide to Treating Pigmentation.