Cradle cap is a harmless skin condition that causes greasy, scaly patches on a baby’s scalp. It’s extremely common, affecting roughly 10% of infants in the first month of life and peaking at around 70% of babies by three months of age. Despite its appearance, cradle cap doesn’t bother your baby, isn’t contagious, and almost always clears up on its own.
What Cradle Cap Looks Like
The patches typically appear as yellow, white, or brown scales that stick to the scalp and resemble fish scales. They can look crusted or waxy, and they often flake off in pieces. On lighter skin tones, the scales may be surrounded by a pink or red rash. On darker skin tones, the surrounding rash can appear lighter or darker than your baby’s normal skin color.
One key feature that sets cradle cap apart from other skin conditions: it’s oily, not dry, and it generally doesn’t itch. This is the main way to tell it apart from eczema, which tends to be dry, inflamed, and itchy. Eczema can also show up on the scalp, but it more commonly appears on other parts of the body, while cradle cap is concentrated on the top of the head.
What Causes It
The exact cause isn’t fully understood, but two factors play a role. First, hormones that pass from mother to baby before birth can overstimulate the oil glands in a baby’s scalp, causing them to produce excess oil (called sebum). Second, a naturally occurring fungus that thrives in oily environments appears to contribute. The fact that antifungal treatments help control symptoms supports this theory. Neither poor hygiene nor allergies cause cradle cap.
How to Treat It at Home
Most cases respond well to a simple routine you can do during bath time. Wash your baby’s scalp with a gentle baby shampoo and use a small, soft-bristled brush or fine-toothed comb to loosen the scales before rinsing.
If the scales won’t budge with shampooing alone, rub a small amount of petroleum jelly or mineral oil into the scalp and let it soak in for a few minutes. For stubborn patches, you can leave the oil on for up to a few hours. Then brush gently to lift the softened scales and shampoo as usual. Rinsing thoroughly is important here. Leaving oil behind on the scalp can actually make cradle cap worse by feeding the buildup.
Regular shampooing a few times per week helps keep scales from building back up once you’ve cleared them. You don’t need to scrub aggressively or pick at the patches. The scales will loosen over time with consistent, gentle care.
Cradle Cap vs. Eczema
Parents sometimes confuse cradle cap with baby eczema because both involve flaky, patchy skin. The differences are straightforward:
- Cradle cap is greasy and oily, usually painless, and centered on the scalp.
- Eczema is dry and itchy, often red or inflamed, and more likely to appear on the cheeks, arms, and legs.
A baby who seems unbothered by the patches almost certainly has cradle cap. A baby who is fussy, scratching, or has visibly irritated skin in areas beyond the scalp may have eczema, which requires a different approach to treatment.
When It Goes Away
Cradle cap typically appears within the first few weeks of life and is most common around three months. It decreases steadily after that, and only about 7% of children between ages one and two still have it. Most babies outgrow it completely without any lasting effects on their skin or hair. The condition doesn’t cause scarring or hair loss.
Signs That Need a Doctor’s Attention
While cradle cap itself is harmless, the affected skin can occasionally become infected. Watch for redness that spreads beyond the scaly patches, skin that feels warm to the touch, or fluid draining from the area. These signs suggest a secondary infection that may need treatment. Cradle cap that worsens despite regular home care, or that spreads significantly to the face, neck, or body folds, is also worth bringing up with your pediatrician.