International Academy of Cosmetic Dermatology
A milial cyst (milium s, milia p) is a small keratin-filled cyst, often found on the face. It represents hardened keratin that distinguishes a whitehead from an epidermal inclusions cyst. The milium is associated with a vellus hair follicle or eccrine sweat duct. This lesion is quite common in women who apply moisturizers and are also found in one out of 12 newborns. Milial formation can also be a complication of facial cosmetic dermatology; i.e. Dermabrasion, chemical peels, and laser resurfacing.
Noah Scheinfeld, MD, JD