Understanding of acne has undergone a rapid change over the last couple of years in terms of its epidemiology, pathogenesis, clinical variants, etc. Acne is no longer a disease of adolescence but can involve anyone from pediatric to geriatric age group. Also, many systemic drugs and a few syndromes are associated with acne. This book is meant to be a comprehensive ready-reckoner for busy practising dermatologists, residents, postgraduate students and family physicians alike.