Anorexia nervosa (AN), a serious and complex eating disorder, typically emerges during adolescence. It can have a chronic course, and current treatment outcomes are moderate. This thesis aimed to explore adolescents’ experiences of treatment for anorexia nervosa. In Part A of this portfolio, a systematic review of qualitative literature is presented exploring adolescents’ experiences of treatment and their conceptualisation of recovery and the process of change. Thematic synthesis found that adolescents conceptualise recovery as a process that emerges over time. Internal and external factors can have a reciprocal relationship, which can help or hinder change. In Part B of the portfolio, an empirical paper explores the experiences of adolescents’ views on the relationship between AN and their identity, and how this influences their perspectives on the use of externalisation as a therapeutic technique. Reflexive thematic analysis found that adolescents view AN as closely linked to their identity which can impact their response to externalisation. They viewed externalising as a helpful tool to separate their identity over time, which was seen as an important part of recovery, though this separation may initially be rejected.