HIFU uses focused ultrasound pulses that penetrate and heat up the deeper layers of the skin. Once the targeted area reaches a certain temperature it creates controlled damage and causes collagen fibres to bundle together and a cascade reaction to create new collagen fibres. As collagen is the scaffolding of your skin increased collagen production gives a firmer, more tightened effect on the skin. There is some immediate tightening effect, but the main results take 3 months to show.
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