A single MiraDry session can take about one hour to perform from start to finish. The entire treatment is performed in-office. Since it is non-surgical and non-invasive, local anesthesia is used to numb the treatment area. Before treatment, the target area is predetermined and marked for accuracy. As the MiraDry system delivers the heat-energy to the sweat glands, you will not feel anything since the local anesthesia is at work. You may feel the suction of the treatment head as it draws your skin closer to maximize energy penetration.