If you've noticed new patches of darker skin on your cheeks, forehead or upper lip during or after pregnancy, you're far from alone. The British Skin Foundation notes that melasma can affect up to half of pregnant women, which is why it's sometimes called the ‘pregnancy mask’, even though the pattern of who gets it and how badly varies enormously.

Why pregnancy triggers it

Melasma is driven by melanocytes, the pigment-producing cells in skin, becoming more active in response to hormonal shifts, particularly oestrogen and progesterone. Pregnancy is one of the biggest hormonal shifts the body goes through, which is why melasma so often appears or worsens during this time. Sun exposure compounds it further, since UV light is one of the strongest known triggers for melanin production.

What tends to happen after birth

For many women, melasma fades naturally in the months after delivery as hormone levels settle, and treatment may not be necessary at all. For others, it lingers, or returns with a future pregnancy or a change in hormonal contraception. There's currently no guaranteed cure, according to the British Association of Dermatologists, but there's a lot that can be done to manage its appearance and reduce the chance of it worsening.

What to be mindful of while pregnant or breastfeeding

Some of the strongest pigmentation-targeting ingredients, including certain retinoids and higher-strength acids, aren't recommended during pregnancy or breastfeeding. This isn't a reason to do nothing, but it is a good reason to check any new active with your GP, midwife or pharmacist before adding it in, and to lean on the things that are safe throughout: gentle, barrier-supporting skincare and daily SPF.

What actually helps in the meantime

Consistent sun protection is the single most useful habit, since UV exposure is one of the clearest triggers for melasma getting worse. Beyond that, a calm, non-irritating routine gives your skin the best chance of managing existing pigmentation without adding new post-inflammatory marks on top. Consistency matters more than intensity here: melasma responds slowly, and pushing harder isn't the same as pushing effectively.

FAQs

Will melasma from pregnancy definitely go away on its own?

For many women it fades within a few months of delivery, but not for everyone, and it can return with a future pregnancy or hormonal changes. If it hasn't improved after several months, it's worth discussing options with a GP or dermatologist.

Is it safe to use brightening skincare while breastfeeding?

Many gentle brightening ingredients are considered fine, but some stronger actives aren't recommended during breastfeeding. It's always worth checking a specific product or ingredient with your GP, midwife or pharmacist if you're unsure.

Does melasma mean something is wrong hormonally?

Not usually. It's a common, benign response to normal hormonal shifts like pregnancy, and isn't a sign of an underlying health problem for most people. Rarely, it can be linked to conditions like thyroid imbalance, which a GP can rule out if needed.

Research & further reading

•     British Skin Foundation — Melasma: britishskinfoundation.org.uk/conditions/melasma

•     British Association of Dermatologists — Melasma patient information leaflet: bad.org.uk/pils/melasma