This paper questions the conventional wisdom that physicians must suppress anger in response to patient misbehaviour. It distinguishes the emotion of anger from its expression, which leans toward concerned frustration and disappointment for the sake of professionalism in patient care. Drawing on the framework of person-centred health care as a virtue ethic, the paper first suggests four reasons why and when physician anger toward patient behaviour may occasionally be appropriate: the inevitability of sometimes feeling angry, anger as a cognitive and (...) behavioural resource, physician well-being, and potential patient benefit. The paper then proposes five conditions under which physician anger displays may be prudent as a measured response that balances emotional expression with professional conduct: ethical intention, rational justification, proportionality, problem-focused constructive expression, and precision. Potential benefits of this conceptualization of prudent anger include improved physician wellbeing, enhanced communication, and patient education to address perceived patient misbehaviour. The paper advocates for a cultural shift in health care environments to help allow for more authentic expression of physician frustration, aiming to harness prudent anger as a catalyst for positive change in patient-physician relationships and systemic improvements in health care delivery. (shrink)