Clinic terms in Busan Seomyeon, translated into plain language.

Not understanding a word in a consultation is common and rarely mentioned, because asking feels like admitting something. It is not. This page covers the terms that come up most, so you can skip that step entirely.

Anatomy terms

SMAS — the fibromuscular layer beneath the skin that surgeons tighten in a facelift, sitting around 4.5mm deep and targeted by focused ultrasound. Dermis — the living layer below the surface where collagen sits. Tear trough — the groove between lower lid and cheek. Masseter — the chewing muscle at the jaw angle. Platysma — the broad sheet running from chest across the jawline.

Injectable terms

Unit — the measure for botulinum toxin, not comparable across brands. cc — the volume measure for filler, roughly a fifth of a teaspoon. G-prime — how firm a filler gel is; high for structure, low for lips — see filler brands and G-prime. Cannula — a blunt tube used instead of a needle in some areas. Hyaluronidase — the enzyme that dissolves hyaluronic acid filler.

Laser terms

Fluence — energy delivered per area, the setting that most affects both result and risk. Picosecond — pulse duration measured in trillionths of a second, which fragments pigment with less heat. Fractional — treating in columns with untreated skin between them, which is what allows healing. Ablative — removing surface tissue. Non-ablative — heating beneath while leaving the surface intact.

Pigment terms

Fitzpatrick type — a scale of skin response to UV, from I to VI, which sets the energy ceiling on pigment treatment. PIH — post-inflammatory hyperpigmentation, the darkening that follows inflammation on higher types — see PIH risk on Asian skin. Melasma — a chronic hormonally driven pigment condition, managed rather than cured. Lentigo — a discrete sun spot.

Line and movement terms

Dynamic — a line that appears only on movement, treated with botox. Static — a line visible at rest, needing volume or resurfacing. Glabella — the area between the brows. Nasolabial fold — the line from nose to mouth corner. Marionette lines — from mouth corner downward — see botox or filler.

Device and pricing terms

Shot / line — one delivery of energy; the count is what determines coverage and is the number that decides whether a session does anything. Cartridge — the consumable holding a set number of shots, with a non-resettable counter. Tip — the equivalent for radiofrequency. Depth — which layer a device treats, usually stated in millimetres — see how to read a price list.

Regulatory terms

MFDS — Korea's Ministry of Food and Drug Safety, the national regulator — see MFDS approval. Off-label — using an approved product for an indication outside its approval wording, common and legitimate across medicine. Lot number — the batch identifier on every genuine syringe or vial, which you can ask to see.

Treatment category terms

Booster — anything injected into the dermis to improve skin quality; a category rather than a product — see Rejuran or a hydrating booster. Polynucleotide — a repair signal derived from salmon DNA. PLLA / PDLLA — collagen stimulators that build your own tissue over months. HIFU — high-intensity focused ultrasound. RF — radiofrequency.

Aftercare terms

Downtime — used loosely; here it means anything another person would notice rather than only what hurts — see no-downtime treatments. Occlusive — a balm that seals the surface, used after resurfacing. Barrier — the outer layer that holds water in and irritants out, and the thing over-treatment damages. Purpura — bruise-like discolouration that is sometimes the intended endpoint of a vascular laser setting rather than a complication.

Words that mean less than they sound like

Medical-grade — unregulated as a term and applied to almost anything. Premium — a price position rather than a specification. Advanced — no defined meaning. Natural-looking — a dosing decision rather than a product property, which is why it belongs in the conversation about units rather than in a brochure. Each of these appears frequently in clinic materials and none of them tell you what is being used or how much — see what nobody tells you.

What to do when you hear an unfamiliar word

Ask, immediately and without preamble. "What does that mean?" is a normal question and the answer takes ten seconds. Patients who nod through a consultation and look it up afterwards frequently discover they agreed to something they had understood differently — which is a larger problem than a moment of not knowing. If an explanation does not land, ask for it a second way rather than accepting it — see how a consultation works. A doctor who cannot restate something in plainer terms either does not understand it well or is not trying, and both are worth knowing before you consent to it.