Acne detergicans.

Popular brands of soaps and shampoos were assayed for comedogenicity in the rabbit ear. Only a small number produced hyperkeratosis when applied at a 25% concentration. Bacteriostatic substances, especially hexachlorophene, were mildly comedogenic. Conventional soaps include salts of fatty acids; the latter are known comedogens. The obsessive use of soaps by patients with acne vulgaris may aggravate the disease and result in its extension to unusual locations.