Nasolabial filler
Small amounts of a soft, flexible hyaluronic acid filler such as Juvéderm, Restylane or Belotero placed along the fold to soften it while keeping movement natural.
Wrinkles & Volume Loss
Smile Line Treatment in Gangnam, Seoul
Softer smile lines without losing your natural expression — our women doctors combine precise hyaluronic acid filler, collagen stimulation and lifting to treat the cause, not just the crease.
20 min
filler visit, same-day return to plans
A
What is the most effective treatment for smile lines?
Smile lines (nasolabial folds) usually respond to a combination: hyaluronic acid filler to soften the fold, plus support for the mid-cheek, where volume loss often deepens the line. At Nest Clinic we may add Sculptra for gradual collagen or ultrasound lifting such as Ulthera for laxity. Filler effects are visible immediately and typically last 9–18 months; results vary with skin quality, age and lifestyle.
- Treatment time
- About 20–40 minutes
- Downtime
- Minimal — possible swelling or bruising for a few days
- Onset
- Filler: immediate; collagen and lifting: 2–3 months
- Longevity
- Filler typically 9–18 months
- Anesthesia
- Numbing cream; most fillers contain lidocaine
- Reversibility
- Hyaluronic acid filler can be dissolved
Understanding smile lines
Why the fold deepens
Smile lines run from the sides of the nose to the corners of the mouth. Everyone has them to some degree — they are where the cheek meets the lip. They become deeper with age as the mid-cheek fat pads lose volume and descend, skin collagen thins and ligaments loosen.
Because the cause is often above the line itself, filling only the crease can look heavy. Our doctors assess the cheek, jawline and skin quality together, and also look at related concerns such as marionette lines and loss of facial volume.
Signs your smile lines may benefit from treatment
- The fold stays visible when your face is relaxed
- Make-up settles into the line by midday
- Your cheeks look flatter than they used to
- The lower face looks tired or heavier in photos
- Lines appear deeper on one side than the other
Very deep folds often relate to sagging skin; in that case lifting first and filling second usually gives a more natural result.
Our approach
Treating smile lines in layers
Your doctor chooses from these options depending on how deep the fold is and what is driving it.
Mid-cheek support
Restoring volume high on the cheek lifts the tissue that falls into the fold — often more effective than filling the line itself. See cheek fillers.
Sculptra collagen stimulation
Poly-L-lactic acid builds your own collagen gradually over 2–3 sessions for a subtle, longer-lasting improvement in support.
Ultrasound lifting
Ulthera or Ulthera Prime targets the deeper SMAS layer to tighten lax tissue around the lower face, with gradual change over 2–3 months.
Radiofrequency tightening
Thermage FLX, XERF or Oligio heat the dermis to firm skin and improve crepiness around the mouth.
Skin quality boosters
Rejuran or Skinvive improve hydration and elasticity so the surface line looks softer and fine creases are less visible.
What to expect
A softer, natural fold
Drag the handle to compare. The aim is a gentler transition from cheek to mouth, not an erased or flat smile.
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Before
After 2 wks
Illustration for explanation only — not a patient photograph. Individual results vary; real case photos are shown during your consultation.
Is it right for you?
Good candidates
- Moderate smile lines visible at rest
- Mild mid-cheek volume loss
- Early lower-face laxity
- Visitors who want a subtle change with little downtime
- Patients who prefer a reversible first step
If you have had permanent fillers or implants in the area, please tell us — it changes which options are safe.
Safety first
Possible side effects
Swelling, tenderness, redness and small bruises at injection points are common and usually settle within 3–7 days. Uncommon risks include lumps, asymmetry, infection and delayed inflammatory reactions.
A rare but serious risk of any filler is blockage of a blood vessel. We reduce risk with detailed anatomical knowledge, cannula techniques where appropriate, slow low-pressure injection, and hyaluronidase on hand to dissolve hyaluronic acid filler immediately if needed.
We postpone treatment during pregnancy or breastfeeding, with active skin infection or cold sores near the area, or with certain autoimmune conditions — your doctor will review your history.
Your visit
How treatment works at Nest Clinic
Face assessment
Your doctor analyses cheeks, folds and skin quality.
Personal plan
Filler, collagen or lifting mix agreed together.
Numbing
Topical anaesthetic for comfort.
Precise treatment
Small, measured placement or device passes.
Aftercare
Ice, check of symmetry and written aftercare.
Medical reviewer · Chief Medical Doctor
Dr. Kyung-yeon Lee
Dr. Lee trained at Seoul National University College of Medicine (M.S.) and completed residency at Seoul National University Hospital. Before joining Nest Clinic she was director at VS Line Clinic in Apgujeong. Nest Clinic is led entirely by women doctors, with one-to-one consultations rather than high-volume treatment.
Seoul National Univ. College of Medicine
Korean Society for Aesthetic Laser Surgery
Korean Academy of Facial Filler
Key Doctor · Jetema e.p.t.q.
This page was medically reviewed by Dr. Kyung-yeon Lee in October 2026. It is for general information and does not replace an in-person diagnosis.
FAQ
Smile Lines questions, answered
Will filler make my face look puffy?
Not when the amount and placement are conservative. We often treat the mid-cheek rather than overfilling the fold, which keeps the face natural when you smile.
How long do smile line fillers last?
Hyaluronic acid filler in the smile lines typically lasts 9–18 months, depending on the product, your metabolism and how expressive your face is. Sculptra and lifting results build gradually and usually last longer.
Can I fly home after treatment?
Yes. Most patients can fly the next day. Swelling may be slightly more noticeable on a long flight, so we suggest keeping hydrated and avoiding alcohol for the first 24–48 hours.
Does it hurt?
We apply numbing cream and most fillers contain lidocaine, so most patients feel only mild pressure. Ultrasound lifting can feel more intense along bony areas; we discuss comfort options beforehand.
Filler or lifting — which do I need?
If the fold is mainly from volume loss, filler or Sculptra helps most. If skin is lax and drooping, Ulthera lifting
or radiofrequency often comes first. Many patients benefit from both.
Can it be reversed if I don't like it?
Hyaluronic acid filler can be dissolved with hyaluronidase. Sculptra and device treatments cannot be reversed, which is why we start conservatively.
Related treatments
Explore lower-face care
Consultation
Soften your smile lines
Send a relaxed and a smiling photo on WhatsApp for a first opinion in English, then book a face assessment with our doctors.
Nest Clinic Gangnam · 4F–5F Seocho Building, 453 Gangnam-daero, Seocho-gu, Seoul
Sinnonhyeon Station Exit 7 · Gangnam Station Exit 10
Mon–Fri 10:00–20:00 · Sat 10:00–17:00 · Sun closed
Results differ from person to person. All medical procedures carry potential risks and side effects; a doctor will explain them before treatment. Information on this page is educational and not a substitute for a personal medical consultation.
