Acne cosmetica
（重定向自Comedogenic）
The term acne cosmetica refers to acne caused by or aggravated by cosmetics. The mechanism was presumably a chemically induced plugging of the pilosebaceous orifice. This became a significant problem for dermatologists in the 1970s and 1980s, but with the improved formulations produced by cosmetic chemists over the past thirty years, a diagnosis of acne cosmetica has become relatively rare daily dermatological practice.