Patient-initiated brief admission (PIBA) was developed for patients with emotional instability and self-harm, to cope with crises. The hypothesis was that psychiatric symptoms would decrease, and health-related quality of life (HRQoL) increase, after 1-3 days at hospital. One hundred and thirteen patients were recruited from a psychiatric clinic in Stockholm during 2016-2020. At admission and discharge, the patients completed the Hospital Anxiety and Depression Scale (HADS) and the EuroQoL-5 Dimension Questionnaire (EQ-5D). The patients also evaluated PIBA as a crisis intervention. A significant decrease in symptoms of anxiety and depression was found. HRQoL increased significantly assessed with EQ-5D and 95.2% of the participants found PIBA to be a constructive intervention.