Although baby acne is very common, it’s unclear why it develops. Specific causes have not been identified.
Because baby acne typically disappears on its own within several months, no medical treatment is usually recommended. If your baby's acne lingers for much longer, your baby's doctor may recommend a medicated cream or other treatment. Don't try any over-the-counter medications without checking with your baby's doctor first. Some of these products may be damaging to a baby's delicate skin. It is very common. Between 3 and 7 in every 10 babies develop it. It seems to be more common in babies born at full term (between 37 and 40 weeks of gestation) compared with premature babies.