HIFU stands for High-Intensity Focused Ultrasound. It is a non-invasive cosmetic procedure used for skin tightening and lifting. During the treatment, focused ultrasound energy is delivered deep into the skin, stimulating collagen production and tissue regeneration. This results in firmer, tighter skin and a more youthful appearance without the need for surgery or downtime. HIFU is commonly used to address sagging skin on the face, neck, and décolletage, making it a popular option for those seeking non-surgical rejuvenation.