Skin, Hair & Breast
Skin Darkening in Pregnancy
Harmless hormonal pigmentation — melasma on the face, linea nigra down the tummy — that usually fades after birth.
Written and fact-checked by the ParentVibes editorial team against WHO, NHS, ACOG and peer-reviewed guidance. Not yet reviewed by a named clinician.
Quick facts
- Most common
- 2nd and 3rd trimesters
- Melasma areas
- Cheeks, forehead, upper lip
- Linea nigra
- Line from navel to pubic area
- After birth
- Usually fades over months
- See a doctor if
- A mole changes size, shape or colour
Alongside your growing bump, you may notice your skin's colour changing in a few distinctive ways — darker patches across your cheeks and forehead, a new dark line running down your tummy, or freckles and moles looking a little darker than usual. These pigmentation changes are extremely common in pregnancy and, in almost all cases, are completely harmless.
This guide explains melasma and linea nigra, what you can do to minimise how noticeable they are, and the one important exception — a mole or patch that changes in a concerning way — that's always worth having checked, pregnant or not.
What is melasma and linea nigra?
Melasma, sometimes called the 'mask of pregnancy' or chloasma, is a patchy darkening of the skin, usually on the cheeks, forehead, nose and upper lip. It's caused by pregnancy hormones triggering pigment-producing cells (melanocytes) to make more melanin, and it's often more noticeable in people with naturally darker skin and made worse by sun exposure.
Linea nigra is a dark vertical line that appears down the middle of the abdomen, usually from the navel towards the pubic area. It's actually a line that's present on everyone (the linea alba) but darkens in pregnancy for the same hormonal reasons as melasma. Both are entirely benign, common, and typically fade — though not always completely — in the months following birth.
General darkening is normal too
Many people also notice their nipples, freckles, moles and genital skin appear a little darker in pregnancy. This is part of the same hormonal pigmentation process and is not a cause for concern on its own.
What causes pregnancy skin darkening?
Both melasma and linea nigra come from the same underlying hormonal process, with sun exposure often making pigmentation more visible.
Pregnancy hormones
Rising oestrogen and progesterone stimulate melanocytes (pigment-producing skin cells) to produce more melanin, darkening certain areas of skin.
Sun exposure
UV light stimulates melanin production further, which is why melasma often becomes more noticeable in summer or with unprotected sun exposure.
Skin tone and genetics
Melasma is more common and often more visible in people with naturally darker skin tones, and there can be a family tendency towards it.
Existing pigmented areas
Areas that already had more pigment — such as the linea alba, nipples, freckles and moles — tend to darken further in pregnancy.
It usually appears in the second half of pregnancy
Most people notice melasma and linea nigra becoming visible from around the second trimester onward, though timing varies.
When skin darkening is normal
Pigmentation changes in pregnancy are almost always benign. The following are expected and not a cause for concern:
- Symmetrical brown patches on the cheeks, forehead, nose or upper lip (melasma).
- A dark vertical line appearing down the centre of your abdomen (linea nigra).
- Existing freckles, moles or nipples looking slightly darker than before pregnancy.
- Gradual fading of these changes over the months after birth.
| Usually normal pigmentation | Needs medical attention | |
|---|---|---|
| Pattern | Symmetrical patches or an even line | A single mole or patch changing shape |
| Border | Even, gradual | Irregular, notched, or spreading |
| Symptoms | None — painless, no bleeding | Itching, bleeding, or becoming raised |
It's about appearance only
Melasma and linea nigra don't hurt, itch, or affect your health or your baby's — they're a cosmetic change that most people find fades significantly after birth.
Warning signs — when a skin change needs checking
General pigmentation changes are harmless, but see your doctor if you notice any of the following in a mole, freckle or patch:
Seek urgent medical care if you have
- A mole or patch that changes size, shape or colour.
- Uneven, notched or blurred borders on a pigmented spot.
- A mole that becomes raised, lumpy or different in texture.
- Bleeding, oozing or crusting from a mole or pigmented area.
- A mole that becomes itchy or tender.
- Any new, unusual-looking dark spot that wasn't there before, especially if it looks different from your other moles.
Pregnancy hormones can make existing moles look slightly darker, but they shouldn't change in shape, border or texture. Any mole that does should be assessed by a doctor to rule out a skin change unrelated to pregnancy, as pregnancy itself does not rule out other skin conditions, including rare skin cancers.
Self-care for melasma and linea nigra
You can't fully prevent pregnancy pigmentation, but these habits reduce how noticeable it becomes.
Sun protection
- Use a broad-spectrum sunscreen (SPF 30 or higher) on your face daily, even on cloudy days.
- Wear a wide-brimmed hat outdoors if melasma bothers you.
- Reapply sunscreen through the day if you're outside for long periods.
Gentle skincare
- Use a gentle, fragrance-free cleanser and moisturiser.
- Avoid harsh exfoliants or new active ingredients without checking with your doctor first, since some skin-lightening ingredients aren't recommended in pregnancy.
Manage expectations
- Remember most pigmentation fades substantially, though sometimes gradually, after birth.
- If melasma persists, a dermatologist can discuss safe options once you're no longer pregnant or breastfeeding.
Make-up can help in the meantime
A colour-correcting concealer or mineral make-up can even out visible patches if melasma bothers you day to day — this is purely cosmetic and entirely your choice.
When to consult a doctor
Book an appointment if:
- A mole or pigmented patch changes size, shape, colour or texture.
- A mole starts to itch, bleed or become raised.
- You notice a new dark spot that looks different from your other moles.
- Melasma is significantly affecting your confidence and you'd like advice on safe options.
- You're unsure whether a skin change is 'normal' pregnancy pigmentation or something else.
Keep a record of your skin
Note any new or changing marks, ideally with a photo and date, so you can show your doctor exactly what's changed.
Open the Pregnancy TrackerFrequently asked questions
What is the 'mask of pregnancy'?
It's a common nickname for melasma — symmetrical brown patches that appear on the cheeks, forehead, nose or upper lip due to pregnancy hormones increasing melanin production. It's harmless and usually fades after birth.
Will my linea nigra go away after I give birth?
For most people, the dark line fades gradually over the months after birth as hormone levels return to normal, though it may not disappear completely for everyone.
Can I prevent melasma in pregnancy?
You can't fully prevent it, since it's hormonally driven, but daily broad-spectrum sunscreen and sun avoidance significantly reduce how dark and noticeable it becomes.
Should I worry about my moles getting darker in pregnancy?
Existing moles commonly darken slightly due to pregnancy hormones, which is normal. However, any mole that changes shape, border, texture, bleeds or itches should be checked by a doctor, as this is not typical of hormonal darkening alone.
Is skin darkening a sign of a pregnancy complication?
No — melasma and linea nigra are cosmetic changes not linked to complications. The only exception is a mole or patch that changes in a concerning way, which needs assessment regardless of pregnancy.
Your next steps
Track your pregnancy
Log symptoms week by week, get personalised tips, and see how your pregnancy is progressing.
Open Pregnancy TrackerPregnancy week-by-week
Follow your baby's growth and your body's changes from week 1 to 40 in plain language.
Explore the guideFind a gynaecologist
Have a personal concern? Book with a trusted obstetrician or gynaecologist near you.
Find a doctorRelated pregnancy symptoms
Helpful resources
Sources
- NHS — Pregnancy: common symptoms & concerns
- ACOG — Pregnancy resources (American College of Obstetricians and Gynecologists)
- WHO — Maternal health & pregnancy care
- NHS — Skin changes in pregnancy
- ACOG — Skin Conditions During Pregnancy
Next review due: 6 January 2027.
Medical disclaimer
This page is general information about a common pregnancy symptom and does not replace personal medical advice. Every pregnancy is different. If you have severe pain, heavy bleeding, a bad headache with vision changes, reduced or absent baby movements, breathing difficulty, fever, or you feel something is seriously wrong, contact your doctor or midwife or go to your nearest emergency department straight away. When in doubt, always get checked — it is never a waste of anyone's time.
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