What is the right and good action in dealing with young patients in child and adolescent psychiatry? To answer this question, we have to consider professional standards, legal rules, and ethical reflections. With reference to the latter, four bioethical principles were proposed by Beauchamp and Childress to identify and to deal with ethical problems and conflicts. On the basis of this scheme we reflect on the legal aspects and discuss the following topics: (1) self-determination of adolescents concerning their own psychiatric treatment, (2) conflicts between autonomy and care, which occur relatively often, whenever restrictions to personal liberty are indicated, and (3) admission of adolescents in adult psychiatric wards. The bioethical principles facilitate a reliable decision-making process in individual cases. The standards of right and good action have to be implemented in the field of distributive justice. We find evidence that prioritization decisions for inpatient admission are already established in German child and adolescent psychiatry.