The incidence of cancer is raising and the treatments are increasingly aggressive. Consequently, general practitioners, emergency departments, hematologists and oncologists are regularly facing a severe side-effect of cytotoxic therapy, febrile neutropenia (FN). FN is a serious complication of chemotherapy because it can be quickly fatal and causes a temporary or definitive cessation of treatment. In this article, we summarize the latest recommendations for the management of patients with FN under anti-cancer treatments.