 This is a prospective, multi-center, randomized, double-blinded study. Subjects enrolled will be randomly assigned to receive either active treatments for axillary hyperhidrosis with the Ulthera System in both axillas, or sham treatments, also with the Ulthera System but with the energy settings on the device set to deliver no ultrasound energy. Subjects will be randomized in a 2:1 ratio, with 2 subjects randomized to active treatment for every one subject randomized to sham treatment. Subjects will receive 2 study treatments 30 days apart. 