High intensity focused ultrasound (HIFU) is a non-surgical non-invasive skin tightening and lifting procedure where ultrasound waves are passed through the skin with a probe. These waves destroy fat cells and tighten sagging skin by stimulating collagen contraction and new collagen production.
Because of this technology, HIFU is a pretty risk-free procedure. Occasionally, temporary redness, swelling, tingling and numbness can occur during or after procedure that goes away in a few hours to days. Improper techniques or parameters can rarely cause pain, or burns, but in the hands of experienced doctor, chances are almost nil. Therefore, you can take HIFU for great results without worrying about any side effect!