Baby acne, also called acne neonatorum, affects approximately 1 of every 5 babies. Baby acne is a complexion problem that usually affects the chin, cheeks or forehead. Treatment for baby acne is usually just to leave it alone, even though it can be stressful for a parent to see acne on a newborn. Babies who suffer from acne will only have red marks until about 4 months after the baby's birth. Just because your child is diagnosed with baby acne does not mean she will experience acne as a teenager.
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eHow Article: About Baby Acne