For many parents and health professionals, adolescence is a frustrating, difficult and concerning stage, that they hope young people will pass through as quickly as possible. For many, the rapid physical changes of adolescence, all too often, herald changes in adolescent behaviour that result in healthcare no longer having the same priority for young people as it was when they were children and their parents had greater control. The onset of health-risk behaviours and states such as smoking, drug use, unsafe sex and depression, makes the thought of young people simply "snapping out of it" or "waking up to themselves" appealing. Child health professionals, may struggle to establish meaningful therapeutic relation-ships that used to come easily. Earlier efforts at promoting lung health can seem wasted when young people do not share the same priorities for their health, when they fail to follow advice or stop taking their medication. As adult health professionals, the lack of priority that young people place on their health, their failure to attend routine appointments or their apparent immaturity can be equally frustating. In response to these frustrations, health professionals often reassure themselves that adolescence is the healthiest time of life. Traditional measures of disease-based morbidity and mortality support this belief, with adolescents suffering less chronic illness and disease-related deaths than adults or older people. Young people concur, with two-thirds of them rating their health as either "excellent" or "very good" [1]. However, teenagers are the only segment of the population that has not seen a reduction in mortality over the past few decades [2] and the causes of morbidity have shifted increasingly towards social and mental health origins [3]. Young people with chronic respiratory disease are not immune from these broader health risks. Indeed, there is evidence that chronic illness places them at greater risk for participation in health-risk behaviours than healthy young people [4–6]. Within medical circles, the particular perspective that is brought to adolescents with regards to adolescence and their health, is as likely to depend on the position of the viewer as on the reality of adolescent health. As young people move from paediatric to adult healthcare, they risk being conceptualized as either at the end of childhood or the start of adult life. This dichotomous view renders adolescence, as a developmental period, relatively invisible from either medical perspective. It reinforces the notion of adolescence as the healthiest period of life, with health-risk behaviours and mental health disturbance easily dismissed as simply "a stage of life" or "adolescent blues". In doing so, there is a lack of understanding of the potential seriousness of these behaviours or states on disease outcomes, and the continuities of these behaviours and states into adult life. There is also a distinct lack of understanding about how health professionals can work Eur Respir Mon, 2002, 19, 42–59. Printed in UK -all rights reserved. Copyright ERS Journals Ltd 2002; European Respiratory Monograph; ISSN 1025-448x. ISBN 1-904097-22-7. with young people and their families in ways that promote more healthy life trajectories [7, 8]. For all young people, adolescence is a time of change, a time of challenge and a time of greater health risk. Young people with chronic respiratory conditions are first and foremost, adolescents. Understanding adolescent development, the impact this may have on disease management and how to successfully work with young people, will greatly enhance the capacity to achieve better lung health outcomes as much as it will enhance healthy developmental outcomes for young people in general.