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 occur spontaneously and affect 40%-50% of newborns but may be found in patients of all ages. Secondary milia often occur after trauma or subepidermal blistering disorders (ie, 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 race / ethnicity or sex predilection.