In Chapter 6, I argue that the terms ‘mental health’ and ‘mental illness’ have been used interchangeably in the previous literature on the representation of mental illness in the press. Specifically, I argue that using these two terms interchangeably (especially during data collection) may result in incomparable datasets. Through linguistic analysis, I show that the terms ‘mental illness’ and ‘mental health’ are distinct terms, and that the meaning of the two terms has shifted over the time period covered by the MI 1984–2014 Corpus. I argue that the lexical change I observed is consistent with pragmatic accounts of language change in which the language development is in part a result of euphemism (e.g. Traugott & Dasher, 2002).