HIFU or High Intensity Focused Ultrasound, also called ultherapy, is the latest alternative to a traditional facelift. At one time, the only way to reach the deeper facial structures and connective tissue was with a surgical knife. Today, ultrasonic sound waves can take us there! HIFU can reach and affect that deep foundation layer of the dermis with no downtime or post procedural recovery. Although ultrasound is considered harmless, when the energy is focused .