HIFU creates tiny, controlled thermal points beneath your skin. These aren’t burns or injuries — they’re micro-signals that tell your fibroblasts, “Hey, it’s time to rebuild.” Your collagen production switches back on, strengthening and tightening the skin from the inside out. https://www.sw1spa.com/blog/2025/12/5/24k-uplift-facial-zero-downtime-treatment-to-lift-and-tighten-skin