박유미 원장 , 청담 4.4클리닉 블로그

2026-07-03

Dermatology Injections - Fillers (2)

A comprehensive guide on dermal fillers, covering the differences between imported and domestic brands, treatment methods, key points for various facial areas, and managing side effects.

Dermatology Injections - Fillers (2)

✔ Imported vs. Domestic Fillers: Correcting Misconceptions

‘Imported fillers last longer, while domestic ones dissolve quickly.’

👉 This is half true and half false.

Filler longevity is more influenced by:

Individual immune response

Lifestyle habits

Treatment area

These have a greater impact.

However, the main advantage of imported fillers is safety.

The grade of the raw HA material, cross-linking agents, and manufacturing processes are clearly defined,

and extensive clinical data has been accumulated.

This is what accounts for the price difference.


✔ Treatment Methods: Needle vs. Cannula

Needle

Used only for lips and some scar fillers

Cannula (Standard)

All areas except the lips

👉 The blunt tip reduces the risk of vascular damage and bruising.


✔ Filler Anesthesia

Nerve block recommended:

Forehead, nose, front cheeks, side cheeks, marionette lines

Numbing cream is sufficient:

Lips, aegyo-sal (under-eye bags)


✔ Key Points for Fillers by Area

▷ Forehead

Minimum of 3cc; in some cases, 5cc or more may be used.

Combining with forehead and frown line Botox helps the filler settle much better.

▷ Nose

The key is to use a small amount just to shape it.

Restylane Lyft is recommended.

If necessary, threads and fillers can be combined.

For nostril flaring → Combine with nostril Botox.

▷ Aegyo-sal (Under-eye bags)

Do not overdo it ❌

It looks most natural when it is visible only when smiling.

If there is a lack of elasticity → Radiofrequency or Rejuran is recommended first.

▷ Under-eyes

The goal is a 70-80% improvement.

Combining with elasticity treatments yields better results.

Approached together with the front cheeks, including the Indian band.

▷ Front Cheeks

A slight apple zone visible when smiling looks natural.

If elasticity is lacking, combining with lifting is essential.

▷ Nasolabial Folds & Marionette Lines

Fillers alone provide about a 50% improvement.

Combining lifting and fillers is necessary.

▷ Side Cheeks

Excellent for preventing hollowness.

Makes the face look smaller and softens a prominent square jaw.

Essential for improving a peanut-shaped face.

▷ Lips & Chin

A key combination for Asians who often have a weaker lower face.

Chin filler + lip filler + square jaw Botox + lifting

→ Improves overall facial balance.

Mouth corner Botox softens the expression when smiling,

while chin Botox helps improve lower lip curling and chin dimpling.

⚠ What is a Delayed Immune Response to Fillers?

A significant amount of time after the filler procedure,

when sleep-deprived,

after drinking alcohol,

or when immunity is compromised due to a cold, etc.,

👉 only the treated area or the entire face

may suddenly swell severely,

and an allergic reaction with redness, heat, and pain may occur.

What to do in this case?

✔ First, visit the clinic where you received the filler.

✔ If it is too far → Visit a nearby dermatology / plastic surgery clinic / emergency room.

If it occurs once:

→ 1 intramuscular steroid injection +

Oral steroids & antihistamines for about 3 days.

→ Most cases improve, and you can just monitor the progress.

If it repeats twice or more:

👉 The fundamental solution is to completely remove the filler using Hyaluronidase.


✔ When Fillers Need to be Dissolved with Hyaluronidase

When you are unhappy with the shape and it cannot be corrected by molding.

When the filler was injected into the wrong layer.

When it becomes excessive, such as the so-called ‘Avatar nose’.

🔹 The shorter the time since the filler procedure, the easier it dissolves.

🔹 For older fillers,

high-concentration Hyaluronidase may need to be applied in multiple sessions.

⚠ If the filler is encapsulated,

or if it is not a hyaluronic acid filler,

surgical removal may be required.


✔ Information on Hyaluronidase (Filler Dissolving Injection)

Possibility of Hyaluronidase allergy: About 10-20%

Before the procedure, it is mandatory to check:

Past experience with Hyaluronidase

Any other drug allergies

Procedure Process

1️⃣ Allergy reaction test via AST

2️⃣ Application of numbing cream

3️⃣ Injection of Hyaluronidase

4️⃣ Observation in the clinic for at least 15 minutes

If there are no issues, you will receive a prescription and go home.

In case of an allergic reaction → Immediate injection treatment & rest before going home.

🕒 90% dissolves within 3-7 days,

🕒 and the rest dissolves within 2 weeks.

👉 A new filler procedure is recommended 2 weeks after Hyaluronidase.


⏳ Why Filler Longevity Varies

Regardless of whether it is domestic or imported,

Individual immune response

Muscle usage

Lifestyle habits

Treatment area

determine the longevity.

Especially in areas with a lot of movement, like the lips and nasolabial folds,

absorption tends to be faster than in other areas.

✔ The biggest advantage of imported fillers is safety.

→ Due to accumulated long-term research and clinical data,

the possibility of side effects and allergies is relatively low.


✔ To What Extent Can Fillers Correct Asymmetry?

While 100% perfect correction like Photoshop may be difficult,

within the range that fillers can address,

👉 highly satisfactory correction is usually possible.

📌 For more complete results,

lifting lasers, Botox, contouring injections, etc.,

are often performed together as combination treatments.

📸 Before and after photos are

Front / Left and right sides / 45 degrees

With expressions / Expressionless

Angles from above / below

meticulously taken and compared for you.

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