Experiencing symptoms of traumatic stress may be the cost of caring for trauma patients. Emergency nurses caring for trauma patients are at risk for traumatic stress reactions. This study explored the stress and coping behaviors experienced by emergency nurses who provide trauma care. Focus groups were held at three urban trauma centers in the Midwestern United States: a Level I pediatric trauma center, a Level I adult trauma center, and a Level III adult trauma center. Data were collected between December 2009 and March 2010. Data analysis was guided by the principles of grounded theory. Line-by-line coding and constant comparative analysis techniques were used to identify recurring constructs. A total of 48 emergency nurses participated. Recurring constructs emerged in the data analysis and coding, revealing four major themes: care of the trauma patient, professional practice, personal life, and support. Nurse job engagement, burnout, and professional and personal relationships are influenced by trauma patient care. The study's resulting themes of care of the trauma patient, professional practice, personal life, and support resulted in the development of the "trauma nursing is a continual experience theory" that can be used as a framework to address these effects. Intentional support and timely interventions based on this new theory can help mitigate the effects of traumatic stress experienced by trauma nurses.