We routinely treat the neck and chest in conjunction with the face treatment. Other areas we have treated are upper arm laxity, knee area, and scars from abdominal surgery. Stretch marks have been treated but results are variable. We have successfully treated hyperhidrosis (excess sweating in the underarm area) with the Infini as well. When appropriate depths and settings are used, the Infini can be used on all areas of the body.