Local anesthesia allows interruptions of pregnancy until the 16th week; it also permits endo-uterine exploration, conization and treatment of synechiae. In terms of the breast, local anesthesia is indicated for the excision of palpable lesions, benign a priori, regardless of their size or location. The risk of overdose and vascular crossing is lower than with general anesthesia. It reduces hospital stay to a few hours but must be performed in a well-equipped operating suite in case of a possible complication.