Cradle cap, explained

Those flaky yellow patches on your baby's scalp look alarming and mean almost nothing. Cradle cap is one of the most common newborn skin things there is, it does not hurt your baby, and it clears on its own. Here is what it is and how to help it along without making it worse.

1. What it actually is

Cradle cap is the friendly name for infant seborrheic dermatitis, scaly, sometimes greasy patches on the scalp, usually white or yellow and occasionally a bit red. It typically shows up between about three weeks and two months, and most babies have some by three months. It is not an infection, not contagious, and not a sign your baby is dirty.

2. Why babies get it

The exact cause is not fully pinned down, but it is tied to a harmless yeast that lives on everyone's skin meeting extra oil, and in young babies that oil is thought to come from mom's pregnancy hormones still winding down. So it is a normal newborn skin phase, not something you caused and not something better washing would have prevented.

3. It usually does not bother your baby

This is the reassuring part: ordinary cradle cap generally does not itch or hurt, and most babies could not care less about it. It looks worse to you than it feels to them. If a patch actually seems itchy, sore, or is clearly bugging your baby, treat that as a reason to check with the pediatrician rather than plain cradle cap.

4. Gentle care that works

Wash regularly with a mild baby shampoo, daily or every other day. Frequent washing softens the scale and keeps oil from building up.
Loosen the flakes softly with your fingers, a soft brush, or a washcloth during the wash. Never pick or scratch dry crust off, that irritates the skin underneath.
For stubborn crust, soften first. Rub in a little petroleum jelly or a few drops of plain mineral oil, give it a few minutes, then shampoo it out so the oil does not just sit and accumulate.

When to call the doctor

Cradle cap clears on its own within a few months, so mostly you just wait it out. Call your pediatrician if the rash spreads well beyond the scalp, causes real itching or pain, comes with hair loss or an odor, or if a patch turns crusted, weepy, swollen, or grows pus bumps, which can mean an infection that needs treatment.

Frequently asked questions

What is cradle cap?

Cradle cap is the everyday name for infant seborrheic dermatitis: scaly, flaky, sometimes greasy patches on a baby’s scalp, usually white or yellow, occasionally a little red. It is extremely common, it tends to start between about three weeks and two months, and by three months most babies have had some. It is harmless, it is not an infection, and it does not mean your baby is dirty or that you missed something.

What causes it?

The exact cause is not fully understood, but it is linked to a harmless yeast that normally lives on skin combining with extra oil, and in young babies that oil is thought to be driven by mom’s pregnancy hormones still circulating. In other words, it is a normal newborn skin thing, not something you did or did not do. It is not caused by poor hygiene and it is not contagious.

Does it itch or bother my baby?

Usually not. Ordinary cradle cap does not tend to itch or hurt, and most babies are completely unbothered by it, it looks worse to us than it feels to them. If a patch seems genuinely itchy or sore, is spreading widely, or is clearly irritating your baby, that is a reason to have your pediatrician take a look rather than treat it as plain cradle cap.

How do I treat it at home?

Gently, and patiently. Wash the scalp with a mild baby shampoo, every day or every other day, which softens the scale. Before or during the wash you can loosen the flakes with your fingers or a soft brush or washcloth. If the crust is stubborn, rub in a little petroleum jelly or a few drops of a plain oil (like mineral oil) to soften it, then shampoo it out so oil does not just build up. Do not pick or scratch it off dry, that can irritate the skin.

When should I call the doctor?

Cradle cap almost always clears on its own within a few months, so most of the time you just wait it out. Call your pediatrician if the rash spreads well beyond the scalp, causes real itching or pain, comes with hair loss, or has an odor, and see them promptly if a patch becomes crusted, weepy, swollen, or has pus bumps, which can signal an infection that needs treatment. Those are the exceptions, not the rule.

Sources

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Last updated September 2026. Next review December 2026. How we write these: built from current published guidance from the AAP, CDC, FDA/EPA, NIAID, WHO, and other pediatric and public-health authorities, with sources cited on the page. See our editorial and medical policy for how we research, source, and update these, and how we double-check the food advice.

This is general information, not medical advice, and is not individualized for your baby. Always talk to your pediatrician about your baby's diet, introducing allergens, and any reaction. In an emergency, contact emergency services.

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