Milia occur when keratin becomes trapped beneath the epidermis Milia, the most commonly used term, is the plural form of milium, as many milia are usually found together. Milia are also often inaccurately referred to as “baby acne.” Milia tend to go away within one month of appearing on a baby’s skin. Milia can occur in people of all ages but they are most common in newborns, affecting up to 50 percent of them. Milia are typically found on the face, eyelids, and cheeks. In adults, the use of steroid creams can lead to milia on the skin where the cream is applied. However, such side effects from topical medications are rare. Milia are mosty commonly formed from the use of heavy skin care products or hair care items. Comedogenic creams and lotions may prevent the sloughing of dead epidermal skin cells.Want to read more? Subscribe to one of our monthly plans to continue reading this article.