Causes of Baby Acne

Causes of baby acne has not been clearly discovered by experts. 
Researchers once thought that newborns developed baby acne because of stimulation of the baby's sebaceous glands by lingering maternal hormones after delivery. The theory was that hormones from the mother crossed the placenta into the baby, and after delivery, these hormones cause the oil glands on the baby's skin to form bumps that look like pimples. Many researchers now doubt this theory.
Baby acne can cause a lot of discomfort to the baby,  if you spot pimples on baby's cheeks, forehead, chin, or even his or her back, don't be alarmed. Baby acne is very common and temporary. It will go away without any medical treatment.
Baby acne can completely cover the entire baby’s face, causing discomfort and irritation to the child.

Acne commonly appears after a few weeks after the child is born. The baby may also be born with the acne already on his facial area. 

When a newborn has baby acne, he or she has small red bumps or pustules on his or her cheeks, forehead, and chin. The acne will look worse when your baby is fussy or crying.

Traditionally, baby acne sets in at 3 weeks of age, though it may be present from the time of delivery. Male babies are more often affected than female babies

The most frequent types of acne in infants are papules and pustules. Papules are small, solid, rounded red bumps rising from the skin similar to a red pimple. Pustules or whiteheads are a small bump in the skin that has a collection of pus.

Most babies develop acne in and around the face, including the cheeks and sometimes on the scalp. Most lesions that develop will spontaneously resolve themselves within a four-month time frame, thus most newborn babies will not need treatment to clear up their acne. In many cases, baby acne disappears within several weeks.