Are there different kinds of Acne that different age groups get?

Acne not only occurs in teens, as the number of adults suffering from acne has been increasing in the last decade. In 1999, Goulden and Cunliffe published their study of rising cases of acne in adulthood (Prevalence of facial Acne in Adults); they noted that the mean age of patients treated for Acne had increased in a decade from 20.5 years to 26.5 years.