Hyperpigmentation vs melasma in pregnancy

Pigmentation changes are one of the most common skin shifts in pregnancy, and the words used to describe them are often confused. This article explains hyperpigmentation vs melasma in plain language, why melasma tends to appear now and what you can do about it, as part of the Pregnancy Skincare Guide.

What is the difference between hyperpigmentation and melasma?

Melasma is a specific type of hyperpigmentation, not a separate condition. Hyperpigmentation is the broad term for any patch of skin that becomes darker than the skin around it, usually because pigment-producing cells make extra pigment.¹ It covers everything from a single dark mark left by a healed spot to broad, patchy discolouration.

Melasma is one particular pattern within that group. It shows up as larger, symmetrical patches of brown or grey-brown, most often across the cheeks, forehead, upper lip and bridge of the nose.¹ It is strongly linked to hormones and sun exposure, which is why it is so common in pregnancy. So all melasma is hyperpigmentation, but not all hyperpigmentation is melasma. Knowing which one you are dealing with helps you understand how it is likely to behave and to see how skin changes during pregnancy more clearly.

Melasma in pregnancy, explained

Why does melasma appear in pregnancy?

Melasma appears in pregnancy because rising hormones and sun exposure together push the skin to make more pigment. Pregnancy is one of the best-known triggers, and this pattern is common enough to have earned the nicknames the mask of pregnancy and mummy pigment.¹

During pregnancy, higher levels of oestrogen and related hormones increase the activity of the cells that produce pigment.¹ On their own these changes might stay quiet, but sunlight acts as the switch that brings them to the surface. Ultraviolet and visible light are the most important external drivers of melasma and even short, everyday exposure can deepen existing patches.³ This is why pregnancy and pigmentation are so closely connected, and why melasma often settles on the parts of the face that catch the most light. It is a normal, harmless response to a shift in your body, not a sign that anything is wrong.

How do you know if it is melasma?

Melasma is usually recognisable by its pattern: symmetrical, patchy and on both sides of the face at once. It tends to form larger areas of brown or grey-brown across the cheeks, forehead and upper lip, rather than the small, defined marks left behind by a single healed pimple or scratch.¹

Other forms of hyperpigmentation in pregnancy behave differently. A dark mark left after a spot heals, known as post-inflammatory pigmentation, sits exactly where the spot was and fades on its own over time.¹ Melasma is more persistent and more closely tied to sun exposure. If your pigmentation is spread evenly across both cheeks or your upper lip and deepens in summer or after time outdoors, melasma is the likely explanation. A dermatologist can confirm it if you are unsure, and can rule out other causes worth checking.

Will melasma fade after pregnancy?

Melasma often fades in the months after birth, but not always completely. For many women the patches lighten once hormone levels settle, yet a meaningful share of cases persist well beyond delivery.² Studies suggest melasma can remain in a portion of women long after pregnancy, and it commonly returns or deepens in later pregnancies.¹

This is worth knowing so your expectations are realistic and kind to yourself. Fading is gradual and how much it fades varies from person to person. The single most useful thing you can do to help it along is to protect your skin from the sun, both during pregnancy and afterwards, because ongoing light exposure is what keeps melasma active.²˒³ Consistent daily sun protection gives melasma the best chance to settle, and reduces the likelihood of it coming back with the same intensity next time.

How to manage pigmentation during pregnancy

Daily sun protection is the most effective step you can take for pigmentation in pregnancy. Photoprotection from the first trimester onward is the best-evidenced way to reduce and manage melasma, so a broad-spectrum sunscreen worn every day, reapplied when you are outdoors, does most of the work.²

Beyond sunscreen, a few gentle topicals are considered appropriate in pregnancy and can support a more even tone. Diglucosyl gallic acid and vitamin C are both well tolerated and commonly used during this time.⁴ A vitamin C serum for pregnancy can help brighten and even the look of the skin, while a targeted serum for pigmentation during pregnancy supports the same goal in the evening. Some brightening ingredients are best set aside until after birth, so it is always worth checking with your healthcare provider or dermatologist before starting something new.⁵ For a fuller picture, explore the Pregnancy Skincare Guide.

This article is intended as general educational information and does not constitute medical advice. Always consult your healthcare provider or dermatologist before making changes to your skincare routine during pregnancy.