Adolescence can be defined as a period of biopsychosocial transition from a dependent child to an autonomous/independent adult, usually taking place between 13 and 20 years of age. There is considerable variation between individuals and cultures-in some it is truncated to circumcision. As a group adolescents make up 13% of the general population, but they probably account for about 30-40% of both the paediatrician and adult physician's workload, especially when dealing with a chronic disease of limited life span. Adolescence constitutes a large proportion of the life of a patient with cystic fibrosis (CF). The treatment of adolescents poses specific challenges for treating disease and promoting health. In working with adolescents, the treatments for disease are played out against a background of rapid physical, psychological and social developmental changes; changes that produce unique communication and management challenges. At no other time of life are the physical and psychosocial elements of illness and behaviour so inextricably intertwined as in adolescence. This can make working with adolescents difficult; however, given the right skills-which can be learned!-practising medicine with young people can be extremely rewarding and productive.