Background: Breast cancer is the most common form of cancer among women in Sweden. The cancer diagnosis has under the past few years increased and are expected to increase even more in the future. As cancer diagnosis increases, the ability to survive a cancer disease becomes more apparent with the help of advanced treatments. Aim: The aim of this study was to describe women´s emotional reactions when receiving a breast cancer diagnosis. Metod: A literature-based study was performed in order to describe women´s experience about their emotional reactions towards a breast cancer diagnosis. To analyse the result of the 11 included articles, a five step qualitative analytical method was used. The analysis resulted in one major theme and five subthemes. Results: To receive a breast cancer diagnosis was a huge change in life that affected women´s emotional reactions in many different ways. The result showed that women was chocked, they denied the breast cancer diagnosis, felt anger and grief. The women also felt hopefulness to fight and conquer the breast cancer disease. Conclusion: According to the result this study showed that a breast cancer diagnosis transforms a women´s life, from a healthy life to a life in illness. A breast cancer diagnosis did not only bring out negative feelings like frustration and hopelessness. It´s also bring out positive feelings like relief and fighting spirit.