Renuvion and FaceTite both apply radio frequency energy to tissues under the skin to contract them and thus reduce sagging. They are combined with liposuction to first remove fat tissues before the skin is tightened. Ultherapy applies ultrasound technology externally to the surface of the skin to contour the face or neck. Unlike FaceTite or Renuvion, Ultherapy requires several repeat treatments to experience your desired results.