Hello. I am Lee Hong-seon, a board-certified dermatologist with 17 years of experience and the director of Mind Dermatology, where we focus on improving the fundamental health of your skin with care and dedication. Laser treatments that stimulate skin regeneration using high-energy technology have recently gained significant popularity. This is because they offer a non-invasive approach that can enhance skin firmness from within, without leaving any surgical scars. However, since Ulthera treatments at our clinic near Mapo-gu Office Station use high-intensity energy, you may experience side effects such as unwanted burns or sagging cheeks. Today, I’d like to explain why these issues occur and how to prevent them. How does Ulthera work to improve skin elasticity? As many of you know, Ulthera is a lifting device based on HIFU (High-Intensity Focused Ultrasound) technology that utilizes powerful ultrasound waves. The... 