HIFU, or High-Intensity Focused Ultrasound, is a non-invasive treatment that uses concentrated ultrasound energy to heat targeted tissue beneath the skin. In cosmetic treatments, it’s commonly used to tighten and lift the face and neck, improve the jawline, reduce mild wrinkles, and stimulate collagen production without surgery or significant downtime. Results typically appear gradually over a few months and can last around one to two years. HIFU is also used medically to treat certain conditions, including some prostate cancers and uterine fibroids. While generally considered safe when performed by a qualified provider, temporary redness, swelling, tenderness, or numbness can occur, with more serious complications being uncommon.