The regional techniques for axillary analgesia are well established. However, few studies have investigated surgical anesthesia. In this report, extensive debridement of axillary necrotizing fasciitis, including the posteromedial region of the right arm, performed under exclusive regional anesthesia in a patient with probable difficult airway is described. The procedure was performed under a Serratus Plane Block (SPB) and supraclavicular brachial plexus block, guided by ultrasound, and performed with venous sedation. We observed satisfactory anesthesia 15-minutes after the intervention and efficient intraoperative pain control within the following 24 hours. Surgical axilla anesthesia is feasible with the described blocks.