The first few weeks after birth present major changes for a baby. During pregnancy, it was supplied with important nutrients via the mother’s bloodstream. Along with these nutrients, maternal hormones can enter the baby’s blood.
Immediately after birth, when the child is “disconnected” from the mother’s bloodstream, these hormones suddenly drop. In response to the hormonal change, various skin changes can occur including milia, newborn acne, and seborrheic dermatitis, among others.
All of these skin conditions occur around the 3rd week of life and disappear again as soon as the baby’s organism has regained balanced of its hormonal status (2).