HIFU uses the power of ultrasound to tighten skin. Ultrasound, like IPL, is a form of energy that differs from lasers or electrical (radio frequency) energy and light. HIFU penetrates the skin at higher temperatures, causing structural weakening while protecting the skin surface.
It immediately stimulates collagen production, which promotes healing. The target tissue is heated to ~65°C with thermal heating. Within 90-180 days after application, a long-lasting wound-healing response is stimulated in the tissue, resulting in lifting and tightening, with results that can last for years.