Complete shaving of the head is not generally needed for surgery. A patch from the top of the head to behind one ear is usually shaved immediately prior to surgery. Most patients get a haircut two weeks after surgery to even the hair. Once hair grows back, incisions are not seen. Puffiness around the eyes for a few days after surgery is common, although it goes away quickly. The entire device is implanted internally, so there are no visible wires. In a thin individual, the connecting wire may be visible as a bulge in the neck when the head is turned the opposite way. The incision for the pulse generator (battery) will be visible with the shirt off, or in a swimsuit. In thin patients, the pulse generator forms a bulge under the skin below the collarbone that may be apparent if the area is uncovered.