Making contact and caring for mental health patients in emergency rooms is one of many tasks in emergency departments. Mental health problems are a growing phenomenon among all ages. Acute anxiety, depression, psychosis, and even suicidal thoughts are every-day things that are seen in emergency rooms. Emergency room nurses are mostly trained in acute somatic care, not in mental health. The purpose is to research nurses’ experiences among mental health problems in emergency departments. The aim is to combine knowledge from different literature sources, that can be used in future health care and awaken thoughts among emergency room nurses to ponder their skills and professional baseline. Information retrieval for the thesis was performed on three search engines and a manual search. Six articles that met the inclusion criteria were selected for the final literature review. In addition, works found with the help of information retrieval from Jyväskylä University of Applied Sciences and Jyväskylä City Libraries were used as material for the thesis. The results of the thesis were analyzed using a data-driven content analysis method. The results were assorted into two main categories: Negative experience and the importance of education. Nurses should have the basic skills of mental health problems to contact pa-tients, but moreover in-depth information about mental health problems to care for pa-tients. The lack of knowledge made nurses more uncomfortable among mental health patients.