Introduction Emotional regulation is important in mental health nursing practice but individual emotions may require different regulation strategies. There is ample evidence that nurses experience anger specifically during their work, for example when experiencing patient aggression. It is, therefore, important to consolidate what is known about how anger manifests in mental health nursing practice. Aim We aimed to systematically identify, evaluate, and synthesise results from studies about mental health nurses and anger, where anger was measured objectively. Methods Systematic literature review based on PRISMA guidelines. Results We identified 12 studies. A range of validated and non-validated instruments were used. Mental he...