Milia (singular, milium) are minute epidermoid cysts (also known as infundibular cysts) that present as small white or yellow papules, usually on the face of infants and adults although they can also occur in children. They are typically smaller than 3 mm in diameter. Primary milia affect 40%-50% of newborns but may be found in patients of all ages. Secondary milia often occur after injury to the skin, such as from burns or subepidermal blistering disorders (epidermolysis bullosa). Milia have also been known to occur in areas of topical steroid-induced atrophy. Persistent or widespread milia are associated with a number of syndromes. There is no predilection for either sex or for any race or ethnicity.