This chapter analyses the ways in which Byron’s sense of himself as a writer was gradually, often painfully, informed by the evolving discourse of addiction as it was being medicalised throughout the early nineteenth century and subsequently used to describe a troubling new category of behaviour. For Byron, the act of writing and the emerging sense of his own identity as a poet is formulated not simply through metaphors of addiction, which he himself helped to write into culture, but also through its physical expression. This was much more than a figure of speech – his need to write emerged in painful, bodily manifestations; Byron did not simply write about his writing habit – his habit, in part, wrote him.