Newborn Acne and Milia: What They Are and When They Clear

New parents are often surprised to find that their baby's complexion is not the smooth, flawless skin of a nappy advertisement. Newborn skin goes through a series of normal changes in the first weeks of life, and two of the most common — newborn acne and milia — are frequently confused with each other or with conditions that need treatment. Neither does.

Milia: The Tiny White Spots

Milia (singular: milium) are small, white or pearlescent cysts that appear on the face, particularly across the nose, cheeks, and forehead, sometimes extending to the eyelids and chin. They are present in approximately 40–50% of newborns and may be visible at birth or appear in the first days of life.

What Causes Milia?

Milia are caused by keratin — a protein found in skin — becoming trapped in small pockets near the surface of the skin. In newborns, the sweat ducts and skin follicles are not yet fully open, so keratin that would normally shed cannot escape. The result is the characteristic tiny white bumps.

Milia are sometimes confused with whiteheads (comedones), but they are quite different. Unlike whiteheads, milia have no opening (they are closed cysts) and cannot be squeezed out. Attempting to pop them can introduce infection.

When Do Milia Clear?

In newborns, milia almost always resolve spontaneously within two to four weeks, as the skin's surface layer matures and the trapped keratin works its way out. No treatment is needed or recommended.

Simply wash your baby's face gently with warm water and avoid applying lotions or creams to the affected areas, as these can delay resolution.

Newborn Acne (Neonatal Acne)

Newborn acne is different from milia in both appearance and cause. It typically develops at around two to four weeks of age — usually some time after birth, rather than at birth — and peaks at around three to four weeks before gradually resolving.

What Does Newborn Acne Look Like?

Newborn acne appears as red or white small pimples (papules and pustules), typically on the cheeks, forehead, chin, and sometimes the scalp or upper back. Unlike teenage acne, it does not usually include blackheads or whiteheads, and it is not associated with sebaceous gland enlargement.

The spots can look quite angry, particularly when your baby is crying (blood flow increases to the face) or when the skin is warm. This alarming appearance often causes parents to worry unnecessarily.

What Causes Newborn Acne?

The precise mechanism is not fully understood, but the leading explanation involves maternal hormones. During pregnancy, androgens (hormones) cross the placenta and stimulate the baby's sebaceous glands (the glands that produce oil in the skin). After birth, as these hormones gradually leave the baby's system, the sebaceous glands are temporarily overstimulated, producing excess sebum that contributes to blocked pores and spots.

An alternative or additional explanation involves colonisation of the skin by Malassezia species — a type of yeast that is part of normal skin flora but may contribute to neonatal pustulosis in some babies.

Newborn acne is not related to the acne your baby will or will not experience as a teenager. It does not predict adult acne.

Treatment: Nothing Required

This is the most important thing to know about newborn acne: it does not require treatment. Do not apply acne creams, exfoliants, or any medicated products designed for adults or older children to your baby's skin. These products can damage the delicate newborn skin barrier.

Do not scrub the face. A gentle wash with plain water or a very mild baby wash is sufficient. Avoid applying heavy creams or oils to the affected areas, as these can worsen the spots.

When Does Newborn Acne Clear?

For the vast majority of babies, newborn acne resolves completely by three months of age, often well before. No scarring occurs.

When Should You See a Doctor?

Most cases of milia and newborn acne are straightforward and do not need medical assessment. However, see your GP if:

• The spots are accompanied by a rash elsewhere on the body
• Your baby has a temperature above 38°C
• The spots are spreading rapidly or becoming significantly inflamed
• There is any discharge from the spots other than a tiny amount of whitish fluid
• Your baby seems unwell alongside the skin changes
• The spots persist beyond three to four months without any signs of improvement

In rare cases, acne-like spots in a newborn can indicate a hormonal condition requiring investigation. If the spots are very numerous, persist beyond the typical window, or are accompanied by other signs of hormonal excess (such as unusual hair growth), a paediatric review is warranted.

Keeping Newborn Skin Healthy

Beyond leaving milia and newborn acne alone, the general principles of newborn skincare are simple:

• Use fragrance-free, hypoallergenic products if you use anything at all — many experts recommend plain water for the first weeks
• Avoid scrubbing or rubbing the skin
• Dress your baby in soft, breathable fabrics
• Keep the skin well-moisturised in areas prone to dryness without applying anything to the face spots

Both milia and newborn acne are temporary, normal, and harmless. Your baby's skin will be clear before you know it.