HIFU stands for high-intensity focused ultrasound. It is a non-invasive cosmetic treatment that uses ultrasound energy to heat and damage targeted tissues in the skin. This damage causes the body to produce more collagen, which can lead to skin tightening and a reduction in wrinkles.

HIFU is a relatively new treatment, but it has been shown to be effective in clinical trials. It is most commonly used to lift the brow, tighten the neck, and reduce wrinkles around the eyes and mouth. HIFU can also be used to treat skin laxity on the body, such as on the abdomen or thighs.