1. A retrospective case note analysis of 20 patients admitted to hospital for treatment of hypomania revealed that depressive symptoms occurred in at least 28 per cent of cases during early convalescence. Reasons are given to suggest that the true incidence of such symptoms may in fact be considerably greater than this.
2. Depressive symptoms of this kind, although mild and self-limiting in some cases, can sometimes be severe and accompanied by suicidal ideas.
3. The need for intensive follow-up of patients following hypomanic illness, particularly during the first few months after discharge from hospital, is emphasized.