Red flags — seek medical review if:
- Any rash comes with fever, the baby seeming unwell, blistering, weeping, or spreading rapidly.
- Nappy rash does not improve after a few days of simple care, or has bright red satellite spots suggesting a yeast infection.
- Cradle cap becomes red, swollen, or oozing rather than simply flaky.
- Any newborn skin finding that looks like bruising, bleeding under the skin, or does not fit the patterns above.
If your baby has a fever, remember: fever of 38°C or more in a baby under 3 months is an emergency — do not give paracetamol and wait; seek urgent medical care.
Why newborn skin looks different
A newborn's skin has spent nine months in fluid and is suddenly adjusting to air, temperature changes, friction from clothing, and its own developing oil and sweat glands. Several harmless skin patterns are extremely common in the first weeks as the skin settles into its new environment, and recognising them can save a lot of unnecessary worry.
Erythema toxicum
This is a very common newborn rash of small red blotches, sometimes with a tiny white or yellow bump in the centre, that can appear anywhere on the body, typically from day 2 or 3 onward. It comes and goes, sometimes seeming to move to different areas over hours or days, and settles on its own, usually within one to two weeks, without any treatment. Despite the alarming name, it is not toxic and is thought to reflect a normal newborn skin and immune reaction rather than any infection or allergy.
Milia
Milia are tiny white or pale yellow bumps, most often across the nose, chin, and cheeks, caused by small amounts of skin debris trapped in developing oil glands. They typically clear on their own within a few weeks and should not be squeezed, scrubbed, or treated with any product — leaving them alone is the correct approach.
Cradle cap
Cradle cap (infantile seborrhoeic dermatitis) shows up as greasy, yellowish, sometimes flaky patches on the scalp, and occasionally the eyebrows or behind the ears. It is related to overactive oil glands in early infancy rather than poor hygiene, and it is not itchy or bothersome to most babies even though it can look dramatic to parents. Gentle regular washing with plain baby shampoo, and softly brushing loose scale away with a soft brush after bathing, is usually all that is needed; it typically resolves over weeks to months.
Nappy rash
Nappy rash is redness and sometimes soreness in the nappy area, most often caused by prolonged contact with urine and stool, friction, or occasionally a yeast (candida) overgrowth if the rash persists or has satellite spots beyond the main nappy line. Frequent nappy changes, cleaning gently and patting dry rather than rubbing, and allowing some nappy-off airing time when practical are the mainstays of everyday prevention and care. A barrier product applied at each change can help protect skin that is already a little irritated.
We are not able to say that any particular cream or oil prevents these skin conditions from developing in the first place — evidence for prevention (as opposed to managing an existing rash) is not settled, so this page does not make that claim.
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Message us on WhatsAppClinical thresholds in this page were reviewed and signed off by Dr Didier Decamps on 17 August 2026. This is general information and does not replace an individual assessment by a qualified clinician.
Written with AI assistance. Reviewed, corrected and signed by Dr Didier Decamps, paediatrician.
Last reviewed: 17 August 2026