This paper is intended to put knowledge in conflict management into practice through reflecting on a nursing case study. Nursing organizations are particularly vulnerable to conflict as the context of nurses' work may be difficult and stressful. Power conflict is argued to be an important source of tension within nursing units. Learning to manage conflict at an early stage is therefore crucial to the effective functioning of nursing organizations. A nursing case study that illustrates power conflict in an oncology nursing unit is displayed and reflection on conflict management from the case is provided. There is no appropriate or inappropriate strategy to deal with conflict. However, detecting initial symptoms of conflict and adopting the most effective behaviour to conflict resolution is essential in nursing units. Further nursing education in conflict management for staff nurses and nurse managers is greatly needed.

Accessible Summary: What is Known on the subject?: Working on the frontline during the pandemic has had a negative impact on the mental health of health professionals. A significant proportion experienced anxiety, insomnia, posttraumatic stress or depression. What the paper adds to existing knowledge?: Analysis and synthesis of the evidence of the impact of the COVID‐19 pandemic on the mental health of nurses based on their work context. There exists a gap in the literature as no studies were found that analysed the effects on nurses' mental health according to the level of care they worked in (hospital–primary care–nursing home). What are the implications for practice?: There is an urgent need to assess and respond to the impact of COVID‐19 on the physical and mental well‐being of nurses, and to monitor international policies for the improvement of nurses' working conditions. Introduction: Health professionals have suffered negative consequences during the COVID‐19 pandemic. No review has specifically addressed the impact of the pandemic on the mental health of nurses exclusively according to the work context.Aim: To analyse the impact of the COVID‐19 pandemic on the mental health of nurses who have worked in hospitals, primary care centres and social health centres.Method: PubMed, CINAHL, PsychINFO and Cochrane databases were searched (Prospero number: CRD42021249513). Out of 706 papers, 31 studies (2020–2021) were included in the systematic review. A qualitative synthesis method was used to analyse the data.Results: Most studies were conducted in hospitals or frontline settings. The prevalence of moderate‐to‐severe symptoms was for anxiety 29.55%, depression 38.79%, posttraumatic stress disorder 29.8%, and insomnia 40.66%.Discussion: This review highlights the mental health effects among nurses working in acute hospital settings. It also evidences a data gap on mental health effects among nurses working in primary health care and in nursing homes.Implications for practice: In the post phase of the pandemic, there is an urgent need to assess and respond to the impact on the mental well‐being of nurses, and to monitor international policies for the improvement of nurses’ working conditions.