Anti-Wrinkle and Jawline Slimming Injections in Seoul: A Complete Guide at Lalian Cheongdam Clinic
✓ Medically reviewed by Dr. Jiyoun Kang · Last updated: May 27, 2026 · Reading time: 7 min
Anti-wrinkle and jawline slimming injections are two of the most-requested treatments among international patients visiting Lalian Cheongdam Clinic — a private aesthetic dermatology practice in the Cheongdam neighborhood of Gangnam District, Seoul, South Korea, near Apgujeong Rodeo Station. Both treatments share the same active ingredient — botulinum toxin — but they address very different concerns: anti-wrinkle injections soften expression lines that have deepened with time, while jawline slimming injections refine the shape of the lower face through targeted masseter muscle relaxation. This guide explains what each treatment does, who they suit, and what to expect from a session with Dr. Jiyoun Kang
Quick Answer: Anti-wrinkle and jawline slimming injections use small doses of botulinum toxin to temporarily relax targeted facial muscles — softening forehead, glabellar, and crow's feet lines, or refining the jawline through masseter reduction. At Lalian Cheongdam Clinic in Cheongdam, Seoul, Dr. Jiyoun Kang personally administers each session, with visible results in 7 to 14 days and longevity of 3 to 6 months. Individual results may vary.
What Are Anti-Wrinkle and Jawline Slimming Injections, Exactly?
Both treatments use the same active ingredient — botulinum toxin type A, a purified neuromuscular protein regulated as a prescription medication. When injected into a targeted muscle in carefully calibrated micro-doses, the toxin temporarily blocks the release of acetylcholine at the neuromuscular junction, which in turn relaxes the muscle. The treated muscle does not move with the same intensity for several months until normal nerve function gradually returns.
Anti-wrinkle injections target the small expression muscles of the upper face — typically the frontalis (forehead), the corrugator and procerus (glabellar "11" lines), and the lateral orbicularis oculi (crow's feet). When these muscles are relaxed, the overlying skin no longer creases as deeply during expression, and existing dynamic lines progressively soften. The formulations used at Lalian are botulinum toxin type A products with full Korea MFDS clearance for aesthetic indications and a long-established record in clinical dermatology.
Jawline slimming uses the same toxin but targets the masseter — the large chewing muscle that runs along each side of the lower jaw. In patients with masseter hypertrophy (an enlarged or overdeveloped chewing muscle), the muscle gives the lower face a square or wide appearance from the front. Precise doses injected into the masseter cause it to slowly atrophy over four to six weeks, producing a more refined oval contour without affecting bite strength in any meaningful way at standard cosmetic dosing. Long-established clinical research on aesthetic botulinum toxin technique in the mid and lower face documents this mechanism in detail.
Who Is a Good Candidate?
Anti-wrinkle and jawline slimming injections are well-established treatments with a long safety record, but not every concern responds to them — and not every patient is a candidate. Suitability is always assessed during a private consultation with Dr. Kang.
Good candidates for anti-wrinkle injections:
Patients with dynamic expression lines (forehead lines, glabellar 11 lines, crow's feet) that are visible during movement but soften at rest
Patients in their late twenties through sixties who want to soften existing lines and slow the deepening of static ones
Patients seeking subtle, naturalistic results that preserve normal expression
Patients with mild jaw clenching or bruxism who may benefit from masseter dosing for both contour and comfort
International visitors who can schedule treatment two weeks before a key event so the result fully develops
Good candidates for jawline slimming injections:
Patients with a visibly square or wide lower face caused by enlarged masseter muscles
Patients with a habit of jaw clenching or teeth grinding that has contributed to masseter bulk
Patients seeking a more oval or V-shaped lower-face contour without surgery or thread lifting
Not ideal for:
Patients who are pregnant or breastfeeding
Patients with neuromuscular disorders (myasthenia gravis, Lambert-Eaton syndrome, ALS)
Patients with active skin infection at intended injection sites
Patients seeking permanent change — botulinum effects are temporary by design
Patients whose primary concern is deep static wrinkles unrelated to muscle movement, where a dermal filler or collagen biostimulator may be more appropriate
Patients with a known history of allergic reaction to botulinum toxin or its excipients
What Does the Procedure Feel Like?
A typical session at Lalian takes ten to fifteen minutes from start to finish. The treatment area is cleansed and marked, and a topical anaesthetic cream may be applied for ten minutes for more sensitive patients — though many find this unnecessary given the very thin needle used. Dr. Kang then performs a series of small injections into the pre-mapped muscle points.
For an upper-face anti-wrinkle session, expect roughly six to twelve injection points across the forehead, glabella, and crow's feet — each one a brief pinch lasting less than a second. For jawline slimming, expect four to six injection points per side along the masseter belly, typically slightly deeper. Ice is applied immediately afterward to reduce the small risk of pinpoint bruising, and most patients return to normal activities — including light makeup and same-day flights — without restriction.
What Results Can You Expect — and When?
Botulinum toxin does not work immediately. Most patients begin to see softening of expression lines two to five days after an anti-wrinkle session, with the full result settling around days seven to fourteen. Lines that were already static and etched into the skin will gradually appear less pronounced as the underlying muscle stops reinforcing the crease, but they may not disappear entirely on the first round — repeated sessions over six to twelve months produce more visible improvement than any single treatment.
Jawline slimming follows a different timeline. Because the result depends on gradual atrophy of the masseter rather than immediate paralysis, visible narrowing typically takes four to six weeks to appear and continues to develop over the following two to three months. Longevity is generally longer than upper-face treatments because the masseter takes time to re-bulk after the toxin effect fades. Individual results may vary based on baseline muscle size, dose, and treatment interval.
Factor | Anti-Wrinkle Injection | Jawline Slimming Injection |
Mechanism | Temporarily relaxes dynamic expression muscles | Gradual masseter atrophy through neuromuscular blockade |
Target depth | Intradermal to subcutaneous | Intramuscular (masseter belly) |
Session duration | 10–15 minutes | 10–15 minutes |
Visible result appears | 7–14 days | 4–6 weeks (gradual) |
Longevity | 3–4 months (longer with regular maintenance) | 4–6 months |
Best suited for | Dynamic expression lines, ages 25–65 | Masseter hypertrophy, square lower face |
The Lalian Approach: Why Anatomy-Specific Dosing Matters
At Lalian Cheongdam Clinic, every botulinum toxin session follows the 1:1 Single Responsibility System — Dr. Jiyoun Kang personally performs the assessment, the muscle mapping, and the injections from start to finish, rather than delegating any portion to staff. This matters more for botulinum toxin than for almost any other aesthetic treatment, because the difference between a naturalistic result and a frozen, asymmetric, or eyebrow-dropped result lies entirely in injection placement and unit precision — judgments that depend on real-time facial-anatomy reading.
Dr. Kang's training as a Family Medicine specialist at Sinchon Severance Hospital, Yonsei University Health System, anchors her practice in disciplined anatomical reasoning. Each consultation begins with 3D MetaView skin imaging to map muscle pull patterns and existing line architecture, followed by a conservative starting dose calibrated to your specific muscle activity rather than a fixed protocol. A two-week follow-up is offered to all patients so that incremental dosing can be added if needed — Lalian's preference is always to start lower and adjust upward, not the reverse. Multilingual coordination is available in English, Japanese, and Mandarin for international visitors.
Frequently Asked Questions
How soon can I see results from anti-wrinkle injections at Lalian?
Most patients notice early softening of expression lines two to five days after the session, with the full effect settling at around seven to fourteen days. If you are planning treatment around a specific event, schedule the session at least two weeks beforehand to allow the result to fully develop and any minor asymmetry to settle on its own.
How long does jawline slimming last after the first treatment?
The first jawline slimming session typically lasts four to six months because the masseter takes time to rebuild bulk after the toxin effect fades. Patients who continue treatment every four to six months for the first one to two years often find that subsequent sessions hold longer, as the muscle adapts to a smaller resting state.
Will my face look frozen or unnatural after anti-wrinkle injections?
Not at Lalian. Dr. Kang's approach is built around conservative starting doses and anatomy-specific placement, so the goal is to soften expression — not to eliminate it. The aim is to remove the deepest lines while preserving normal eyebrow movement, genuine smile shape, and the subtle facial expressions that make a face look like itself.
Can I combine anti-wrinkle injections with Ultherapy or Thermage FLX in the same trip?
Yes — for many international patients, combining a non-surgical lifting treatment with selective botulinum toxin work delivers a more complete result in one visit. Lifting addresses structural laxity, while botulinum toxin addresses dynamic lines and lower-face contour. The sequence and spacing of treatments are planned during consultation to ensure each one performs at its best.
Is this treatment safe for international visitors flying back the same day?
The injections themselves do not contraindicate flying, and most patients fly the same day without issue. The standard recommendation is to remain upright for four hours after the session and avoid rubbing the treated areas — both of which are straightforward during a flight. If significant bruising risk is identified during consultation, Dr. Kang may suggest scheduling the session one or two days before departure as a precaution.
How does Dr. Kang decide the right dose for my face?
Dose selection is individualized based on muscle activity (assessed by asking you to frown, raise your brows, and clench your jaw during the consultation), baseline muscle bulk, prior treatment history, and your specific goals — softer lines versus full smoothing, modest contouring versus more pronounced narrowing. There is no fixed protocol at Lalian. Each face is evaluated and dosed on its own terms.
Ready to Book a Private Consultation?
A consultation with Dr. Jiyoun Kang is the first step toward understanding whether anti-wrinkle or jawline slimming injections are the right approach for your specific concerns — or whether a different treatment from Lalian's menu would serve you better. Each consultation includes a full anatomical assessment, 3D MetaView imaging, and a tailored protocol designed around your features and goals.
About Dr. Jiyoun Kang: Dr. Jiyoun Kang is the Representative Director of Lalian Cheongdam Clinic and a Family Medicine specialist trained at Sinchon Severance Hospital, Yonsei University Health System. She serves as Clinical Professor at Yongin Severance Hospital (Yonsei University Health System) and Preliminary Director of the Korea Academy of Obesity & Aesthetic Treatment. All consultations and treatments at Lalian follow a 1:1 Single Responsibility System — Dr. Kang personally manages every stage from anatomical analysis to the final procedure. More about Dr. Kang →
📍 2F, Dosan-daero 59-gil, 9, Gangnam District, Seoul, South Korea (Cheongdam)
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International visitors welcome. English, Chinese, and Japanese consultation supported.
Medical Disclaimer: All procedures described are medical treatments. Individual results may vary based on skin type, muscle activity, and individual condition. A private consultation with Dr. Jiyoun Kang is required to determine the most suitable protocol for your unique needs. All information provided is for educational purposes and does not replace professional medical advice.
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