American Health & Beauty reports that the Exilis is a device that produces radio frequency energy that is used to tighten skin and reduce fat deposits under the skin, a treatment sometimes called "body contouring." Exilis is cleared by the Food and Drug Administration to treat wrinkles around the eyes. A typical treatment takes about 20 minutes.
Plastic surgeons reported to American Health & Beauty that the Exilis device heats the skin and underlying fat deposits. The localized heating causes the skin to tighten up immediately. It also melts the fat underneath the skin. The melted fat slowly dissolves over the next few weeks or months.
Radio frequency energy is essentially sound waves. The Exilis device uses a monopolar type of radio frequency energy.