Milia A milium is a white papule, 1 to 2 mm in size, composed of laminated, keratinous material and situated as a solid cyst in a pilosebaceous follicle. Milia are fairly common on the brow, glabella, and nose in newborn infants and in such infants tend to disappear quickly and spontaneously. There may be few or many, and they may develop later in infancy, in childhood, and in adolescence. In older children and adolescents, they tend to persist, may precede acne or be associated with incipient acne and commonly develop on or around the eyelids. Milia may be ablated, if desirable, by delicate incision and expression of the keratinous content. Lesions that are treated do not recur, but if new lesions appear, they have to be treated in the same way. The operation is trivial and uncomplicated. There are no preventive measures.