In forensic nursing, carers must balance caring and limiting actions in encounters with patients. Interpreting suffering in others raises awareness of one's own vulnerability. Hence, the aim of this study was to describe the phenomenon of vulnerability as experienced by carers in forensic inpatient care. Nine participants were recruited at a major forensic hospital, and their narratives were analysed with a reflective lifeworld approach. The findings revealed that vulnerability was both a strength and a burden. Vulnerability comprised becoming aware of one's boundaries, being genuine and protecting oneself. Dealing with vulnerability enables carers to open up to patients.