This research explores the experiences of Beth, a university student in the UK, as she comes to be labelled as 'dyslexic', and as she has her diagnosis taken away. Through use of Interpretative Phenomenological Analysis (IPA) and discourse analysis, the research seeks to understand how Beth made sense of these experiences, and to explore the discursive 'life' of dyslexia within this sense-making. The discussion in this paper proceeds chronologically through Beth's story, from 'struggle', to 'legitimation' to 'derogation', and concludes with a call to recognise the role of diagnosis in the field of special educational needs (SEN) from a social constructionist and relational perspective.