In English To meet and work with teenagers may be a challenge for caregivers as adolescence is a period when youths try to establish autonomy. Although asthma is an increasing problem worldwide, few studies have addressed professional caregivers' motives and actions. Therefore, the aim of this study was to describe professional caregivers' strategies in their work with teenagers with asthma. Grounded theory, inspired by Glaser, was used to uncover the phenomenon. The informants were seven professional caregivers who worked at an eight-day asthma camp for teenagers in Sweden. Participant observations and interviews were used, and the first author collected the data and participated in the activities. Findings show that professional caregivers' core concern is to assist teenagers with asthma to take command. This core concern gives rise to five strategies: showing respect, being at hand, promoting own responsibility, promoting to exceed boundaries and promoting reflections. In professional caregivers' attempt to assist teenagers to take command some differences are seen in the way they support boys and girls. One conclusion drawn from our study is that the provisional theory of 'Assisting teenagers with asthma to take command' is not only suitable for professional caregivers working at asthma camps; it may, in some degree, also be used as a source of inspiration for professional caregivers in other settings.