20% of newborns will develop<unk>  however there has been debate if this is an accurate representation of actual diagnosed cases of acne as this could other acneiform eruptions that do not present with comedones like<unk>  cephalic pustulosis.<unk>  occurs more often in boys than in girls.
Neonatal acne
Infantile acne
Papular eruption of blacks
Arbor vitae 
Pomade acne
Tinea imbricata
Woolly hair nevus
Linea alba 