Local and systemic treatments have significantly improved the prognosis of patients with breast cancer. The diagnosis of the disease and its sometimes long-lasting treatments can, however, impair the sexual life of patients. This contributes to a deterioration of their quality of life and can also lead to an alteration of their therapeutic adhesion and therefore of their prognosis. For a long time, the subject remained taboo and little discussed between professionals and patients. It is now becoming obvious that, as with other aspects of medical care, the issue of sexuality must be raised by professionals in order to inform patients of the impact of treatments, to identify their needs, to prevent/treat any complications, and if necessary to refer them to specialists, psychologists/psychiatrists or sexologists.