Behaviour towards colleagues within the nursing team that undermines teamwork and conflicts with standards and policies can be described as problematic. It is important that nurse managers understand and investigate potential problematic behaviour towards colleagues, particularly in today’s healthcare environment where team cohesion and morale are constantly under threat. In this article, the author highlights the challenges for nurse managers and describes the sensitive and respectful exploratory process they need to undertake. Nurses’ behaviours are underpinned by beliefs, values and attitudes so investigating potential problematic behaviour warrants an exploration of these aspects with individual nurses and with the nursing team. Therefore, the author also suggests a way for nurse managers to conduct a collective exploration of the team’s values.