Baby acne is caused by hormones, both the mother’s and the baby’s own, that stimulate oil glands in a newborn’s skin. About 20% of newborns develop it, typically around two weeks of age, though it can appear any time in the first six weeks. The good news: it’s temporary, almost always harmless, and clears on its own without scarring.
How Hormones Trigger Baby Acne
Newborns are born with relatively large adrenal glands that produce high levels of a hormone that stimulates the skin’s oil glands. At the same time, androgens (a group of hormones) passed from the mother during pregnancy add to this stimulation. The result is enlarged, overactive oil glands that produce more sebum than the baby’s tiny pores can handle, leading to clogged pores and small breakouts.
This hormonal surge is completely normal. The baby’s adrenal glands naturally shrink during the first year of life, and hormone levels drop off accordingly. That’s why baby acne resolves on its own, usually within a few days to a couple of weeks, though some cases take up to a month. Boys tend to get baby acne more often than girls because testosterone provides additional stimulation to the oil glands.
What About Yeast on the Skin?
You may have read that a common skin yeast called Malassezia causes baby acne. Earlier theories pointed to this fungus as a trigger for a condition called neonatal cephalic pustulosis, which looks very similar to acne. However, research published in the Journal of the American Academy of Dermatology found no correlation between Malassezia colonization and neonatal breakouts. Healthy newborns without any skin issues actually had similar or higher rates of the yeast on their skin compared to babies with pustules. So while the yeast naturally colonizes baby skin (increasing from about 5% of newborns in the first week to 30% by one month), it doesn’t appear to be the cause of those little bumps.
What Baby Acne Looks Like
Neonatal acne shows up as small red bumps or white-tipped pustules, most commonly on the cheeks, forehead, and chin. It can also appear on the scalp, neck, upper back, and chest. The skin around the bumps may look slightly reddish, but it shouldn’t be flaky, crusty, or oozing. Babies with darker skin tones may develop more raised bumps rather than flat red spots, and the texture of the breakout can be a more reliable indicator than color alone.
Baby Acne vs. Milia
Milia are tiny white cysts caused by trapped dead skin cells just beneath the surface. They’re often confused with baby acne, but the two are easy to tell apart. Milia are present at birth, while baby acne typically appears around two weeks. Milia look like small, firm white pearls, usually clustered on or around the nose. Baby acne produces red bumps and occasional pustules spread across the cheeks and forehead. Milia don’t have the redness or inflammation that baby acne does.
Baby Acne vs. Eczema
Eczema rarely shows up before six months of age, so if your newborn has a rash, eczema is unlikely. When eczema does appear in young babies, it looks quite different from acne: the skin is dry, rough, or scaly, and it often weeps or oozes. Eczema itches, and you’ll notice your baby trying to rub or scratch at it. Baby acne doesn’t itch and doesn’t produce dry or flaky patches.
Location can also help. Both conditions can affect the face, but eczema later spreads to the elbows, knees, and other body creases. It almost never appears in the diaper area. Baby acne stays concentrated on the face, scalp, and upper body. In babies with darker skin, both conditions can cause darkened patches after they heal, but the texture during the active phase is the clearest way to distinguish them.
How Long It Lasts
Most cases of neonatal acne clear up within a few days to two weeks. Some last up to a month. It resolves without scarring, and no treatment is needed in the vast majority of cases. You don’t need to scrub the skin, apply lotions, or use acne products designed for older children or adults. Gentle cleansing with water and a mild baby cleanser is enough. Oils and heavy lotions can actually clog pores further and make the breakout last longer.
When Baby Acne Signals Something Else
Neonatal acne (appearing before six weeks) is almost always benign. Infantile acne is a separate condition that develops between about three and six months of age, tends to be more severe, and can include blackheads, whiteheads, and even cysts in addition to the typical red bumps. Infantile acne is thought to be genetic and usually still resolves on its own, but it warrants a closer look from a pediatrician because deeper cysts carry a small risk of scarring.
Acne that appears in children between ages two and six is rare and can signal an underlying hormonal issue. At that age, the body shouldn’t be producing enough androgens to cause breakouts. Conditions like congenital adrenal hyperplasia, early puberty, or other hormonal imbalances may be involved. Signs to watch for alongside the acne include unusual body hair growth, body odor, or changes in growth patterns. A pediatrician can run simple tests to check hormone levels if acne appears outside the normal newborn window.