Cosmetics for skin, hair, and nails play a vital part in the management and treatment of many dermatological conditions; unfortunately, they may also at times be the cause of some dermatological problems. They are therefore subjects where dermatologists need to be aware of the major commercial developments taking place, in addition to the many common Over The Counter products already available, in order to be vigilant in checking the possible benefits or disadvantages for patients. This text takes a serious look at the integration of skin care products, cosmetics, hair adornments, and nail cosmetics in the daily practice of dermatology, expanding the realm of disease treatment beyond diagnosis and treatment into the maintenance phase of healthy skin, hair, and nails.