A newborn baby's skin will undergo many changes as the baby ages. One of these changes can be the appearance of milia. Milia are small bumps that commonly develop on a newborn's nose, chin, forehead, or cheeks.
Milia tend to be around 1-2 millimeters in size. They can also sometimes appear on the upper trunk, limbs, penis, and mucous membranes. At times, they can be present in the mouths of some newborns and are referred to as Epstein pearls.
While milia may be an alarming finding for new parents, they are normal and typically nothing to worry about.
Milia are most often seen in newborns, affecting up to 50 percent of them. The condition can affect people of all ages, however.
Milia appear as the result of a skin protein called keratin being retained in the skin. They appear as small pearly white or yellow bumps on the surface of the skin.
A newborn baby may develop this condition due to oil gland development and lack of normal skin shedding. The condition will often go away within a month. In some cases, however, it can last until the child is up to 3 months of age.
There are two types of milia:
- Primary milia: This condition occurs in those who have normal and healthy-looking skin
- Secondary milia: This condition occurs in people who have another skin condition
Milia do not only affect newborns and infants. Other forms of milia that can affect adults include:
- Primary milia: This form of milia affects both adults and children. Primary milia commonly appear on areas of the body such as the eyelids, cheeks, forehead, and genitals. This form of milia can last from weeks to months in duration.
- Juvenile milia: Present at birth or beyond, this form of milia is most commonly linked with a range of medical and genetic conditions. Conditions linked with juvenile milia include basal cell nevus syndrome and Gardner syndrome.
- Milia en plaque: This form of milia most commonly affects middle-aged women, though it can be found in children and other adults. Milia en plaque typically presents itself on the eyelid, behind the ears, and on the face in areas such as the cheek and jaw. Milia en plaque can also be associated with other medical conditions, such as lupus.
- Multiple eruptive milia: This form most commonly affects the face, upper arms, and upper portion of the trunk. Multiple eruptive milia are groups of several milia and may produce symptoms of itching.
- Traumatic milia: This form of milia can occur after a traumatic injury, such as some burns and blistered rashes. The milia appear during the skin's healing process.
- Drug-related milia: Drug-related milia can occasionally occur in some people after the use of certain medications on the skin. These medications include corticosteroid creams, hydroquinone, and 5-fluorouracil.