New Delhi [India], June 30: If you have been a keen observer of the latest trends in the world of aesthetics, there is a good chance that you might have heard of High-Intensity Focused Ultrasound (HIFU). This non-invasive anti-ageing treatment has become a rage in the beauty world and among celebrities for its skin tightening, facial transformation, and collagen-boosting effects, all without surgery or downtime. So, how does this technology work, and what makes it an effective treatment for ageing-related skin concerns? Lets understand from the experts.