March 1, 2018Published by Nell Laser Clinic on March 1, 2018Categories HIFU facelift, double chin, fat reductionHow Does 3D HIFU Facelift Work?HIFU or High Intensity Focused Ultrasound is a new non-invasive and safe technology approved by FDA for lifting the skin by tightening the SMAS (Superficial Muscular Aponeurotic System) layer to cause muscle tissue contraction.