Non-surgical dermatology — pigmentation and resurfacing lasers, skin boosters, and energy-based lifting (Ultherapy, HIFU). What most people mean by a Seoul "skin clinic" or "petit" visit.
Also called: pico laser, IPL, pigmentation laser, skin booster, Rejuran, Ultherapy, HIFU, lifting
What to ask about: These are marketed hard and sold in packages. Ask exactly which device and how many shots/sessions, and be wary of "unlimited" course pricing — results and downtime vary a lot by machine and settings.