"I *know* all the things I should be doing …": accounting for mental health and illness in an online mental health discussion forum during the COVID-19 pandemic.

BACKGROUND: Mental health is highly correlated with a person's social and economic circumstances, and the recent COVID-19 pandemic made this connection uniquely visible. Yet a discourse of personal responsibility for mental health often dominates in mental health promotion campaigns, media coverage and lay understandings, contributing to the stigmatisation of mental ill-health.

METHODS: In this study, we analysed how the concept of 'mental health' was discursively constructed in an online mental health peer-support forum in Australia during 2020, the period of the first two waves of the COVID-19 pandemic. An approach informed by Critical Discursive Psychology was employed to analyse all posts made to a discussion thread entitled "Coping during the coronavirus outbreak" in 2020, a total of 1,687 posts.

RESULTS: Two main interpretative repertoires concerning mental health were identified. Under the first repertoire, mental health was understood as resulting largely from the regular performance of a suite of self-care behaviours. Under the second repertoire, mental health was understood as resulting largely from external circumstances outside of the individual's control. The existence of two different repertoires of mental health created an ideological dilemma which posters negotiated when reporting mental ill-health. A recurring pattern of accounting for mental ill-health was noted in which posters employed a three-part concessive structure to concede Repertoire 1 amid assertions of Repertoire 2; and used disclaimers, justifications, and excuses to avoid negative typification of their identity as ignorant or irresponsible.

CONCLUSIONS: Mental ill-health was commonly oriented to by forum posters as an accountable or morally untoward state, indicating the societal pervasiveness of a discourse of personal responsibility for mental health. Such discourses are likely to contribute to the stigmatisation of those suffering from mental ill-health. There is a need therefore for future communications about mental health to be framed in a way that increases awareness of social determinants, as well as for policy responses to effect material change to social determinants of mental health.