Can’t hide under‑eye hollows with makeup? In Korea for tear trough & cheek filler – hyaluronic acid vs. collagen – which to choose?

First things first – don’t get confused by the word “filler”

Have you ever had this experience – you slept a full 8 hours, yet a colleague still asks “Did you stay up late last night?” Concealer can’t hide that line under your eyes, and when the cheek area flattens, nasolabial folds become more noticeable. This “tired look” and “aged appearance” is often not a skin‑surface issue, but deep volume loss at work.

In the Korean aesthetic scene, the two main non‑surgical options for under‑eye hollows (tear troughs) and flat cheeks are hyaluronic acid (HA) filler and collagen filler (with a few regenerative injectables in some cases). They aren’t substitutes for one another – each has its own strengths. This article won’t sell you anything; it lays out the mechanisms, prices (in KRW), recovery, and risks on the table, so you can think clearly.

Two materials, two approaches

🔹 Hyaluronic Acid (structural) – deep “scaffolding”

One‑sentence mechanism: Uses the physical support of cross‑linked hyaluronic acid to “push up” sunken deep tissues, restoring volume. High‑molecular‑weight HA is stiff and works well for deep periosteal support.

• Procedure: Topical anaesthetic for 30 minutes, injection takes about 15‑20 minutes. Popular brands commonly used in Korea include Neuramis, Elravie, or imported Juvéderm, chosen by molecular size.
• Pros: Immediate results – you see the hollow filled right away; reversible (dissolving enzyme available); strong lifting power, especially suitable for moderate‑to‑severe tear troughs with deep cheek collapse.
• Cons / limitations: Hydrophilic nature causes mild swelling in the first 3‑7 days; if injected too superficially or with poor technique, the “Tyndall effect” (bluish tint) can appear under the eyes; duration is relatively shorter – about 6‑12 months.

🔸 Collagen (skin‑integrating) – filling “shadow zones”

One‑sentence mechanism: Injects natural or recombinant collagen to fill hollows; its opaque white colour masks vascular tones, which helps with under‑eye dark circles and fine lines – more “skin‑friendly”.

• Procedure: Also requires topical anaesthetic; injection feels softer. Common Korean brands include Sunmax, Forma, etc.
• Pros: No “translucency” or “blue‑tint” issues; improves periorbital fine lines and pigmented dark circles; more natural texture, ideal for those with thin under‑eye skin and mixed‑type dark circles.
• Cons / limitations: Less support than high‑molecular‑weight HA; may not “hold up” against severe bony defects; requires an allergy test (though rare); duration is shorter – about 4‑8 months, requiring more frequent touch‑ups.

🔹 Extra: regenerative injectables (e.g., PLLA / PCL)

In Korea, some choose poly‑L‑lactic acid (PLLA) or polycaprolactone (PCL) based regenerative materials that stimulate new collagen production. However, these provide gradual improvement and are not suited for those wanting an immediate “fill” for tear troughs – they are more often used for volume layering in the upper cheek area. We won’t expand on them here, but the price comparison at the end includes them for reference.

One table to cure your decision paralysis

⚠️ Table note: Prices are typical ranges from mainstream aesthetic clinics in Seoul’s Gangnam district. Actual costs vary by brand (e.g., Juvéderm is pricier, Korean/domestic brands more affordable) and doctor’s credentials. All are “per area per session” (tear trough or cheek as one area). If combining both areas, the total is roughly the sum of each with a slight discount.

The real cost to your wallet – how much in KRW?

Don’t just look at the results – these trade‑offs are real

General risks for injectables (HA / collagen):

• Vascular occlusion (most serious): If filler is inadvertently injected into a blood vessel, it can cause skin necrosis or even blindness. This is why you must choose a board‑certified plastic surgeon, not just a skin therapist.
• Tyndall effect: HA injected too superficially under the eyes can show a bluish‑grey translucency, especially in bright light.
• Overfilling and “pillow face”: Injecting too much at once can create an unnatural look – “the cheek flies up when you smile”.
• Delayed swelling/nodules: Regenerative injectables, if not massaged evenly, may later form subcutaneous nodules that need patience or steroid treatment.

Not suitable for: Those planning pregnancy, pregnant or nursing women; patients with autoimmune diseases; those allergic to cross‑linking agents or collagen (patch test required); active severe skin infections or acne flare‑ups.

After treatment – DON’T do these “self‑sabotaging” moves

For HA / collagen fillers (days 0‑7):

• Ice is your best friend: Intermittent ice packs (15 minutes each) during the first 48 hours to reduce swelling – but don’t press firmly on the injection site.
• Avoid heat: No saunas, hot baths, Thermage, or RF for a week – heat accelerates HA metabolism and worsens swelling.
• Sleep position: Sleep on your back; avoid sleeping on the side that was filled, to prevent material migration.
• Dietary restrictions: Avoid spicy foods, seafood, and alcohol for a week to reduce inflammation. Especially after collagen, avoid rubbing the eye area.
• Makeup timing: Wait at least 24‑48 hours before applying light makeup; avoid the needle entry points (they close in about 4‑6 hours).

Find your profile – which one are you?