Face Treatments · Apgujeong, Seoul

Jawline Slimming

Botulinum toxin for the masseter muscle to soften a square jaw and create a slimmer V-line.

Quick answer

Every plan at Oaro Dermatology Clinic begins with a 1:1 skin diagnosis by a board-certified dermatologist, so the dose, device settings and session count are set for your skin rather than a template. Meet our doctors or ask about your own skin .

At a glance

Overview

What is jawline slimming?

Jawline slimming is the injection of botulinum toxin into the masseter, the large chewing muscle at the angle of the jaw. When the masseter is bulky, often from clenching, grinding or genetics, the lower face looks square and wide from the front. Relaxing the muscle lets it shrink gradually, so the jaw tapers toward the chin. It is one of the most common aesthetic procedures in Seoul and is often referred to as square jaw Botox or V-line injection.

Oaro Dermatology Clinic in Apgujeong treats patients who want a slimmer lower face as well as those whose main complaint is jaw tightness, headaches or worn teeth from bruxism; the same treatment addresses both.

How jawline slimming works at Oaro

The dermatologist asks you to clench so the masseter can be palpated and its size mapped. Nabota, a Korean botulinum toxin, is injected at three to four points on each side, with the dose matched to muscle bulk and adjusted for any asymmetry. The injection takes a few minutes and feels like small pinpricks. Muscle weakening begins within a week; visible slimming develops over four to eight weeks as the muscle loses volume. Because the effect depends on muscle size rather than fat, patients with a heavy jawline from fat or sagging are directed instead to double chin treatment, jawline contouring injections or lifting with Ultherapy. Combining masseter toxin with chin enhancement is a common way to lengthen the lower face while narrowing it, and all doses and photographs are recorded in your care notebook.

Why patients choose Oaro

• Diagnosis and treatment by a board-certified dermatologist, not a technician
• Genuine devices and products: Ultherapy, Thermage FLX, Helios Pico, Rejuran, Juvelook
• One treatment plan, written down, with aftercare and follow-up
• Private 1:1 rooms in Cheongdam Tower, 8 minutes from Apgujeong Rodeo Station
• English-friendly coordination and clear, itemised pricing

Treatment goals

Common goals for jawline slimming

A narrower lower face

Reducing masseter bulk so the jaw tapers into a softer V-line.

Relief from clenching and grinding

Easing jaw tension, morning headaches and tooth wear linked to bruxism.

Evening an asymmetric jaw

Dosing one side more than the other when one masseter is larger.

Natural, gradual change

Slimming that develops over weeks rather than looking sudden.

Your visit

What to expect

1. Consultation & diagnosis

The dermatologist examines the masseters at rest and clenched, checks for asymmetry, discusses your goals and explains the expected timeline and how chewing may feel during the first weeks.

2. Injection

The skin is cleaned and optionally iced. Three to four injections per side are placed into the belly of the masseter. The visit takes about ten minutes and you can return to work immediately.

3. Aftercare & follow-up

Written aftercare covers the first day. Slimming becomes visible at 4–8 weeks; a review photograph can be sent if you have left Seoul, and repeat sessions are scheduled every 4–6 months.

Cost guide

Jawline slimming cost in Seoul

Masseter toxin in Apgujeong is priced by the units used, which depends on muscle size. Typical 2026 ranges at Oaro Dermatology Clinic:

Exact pricing is confirmed at consultation after examination.

Aftercare

Aftercare

• Do not massage or press the jaw area for 24 hours.
• Avoid lying flat, strenuous exercise and saunas for 4–6 hours after injection.
• Expect mild chewing fatigue with tough foods for 1–3 weeks; it settles as you adapt.
• Skip alcohol on the day of treatment to reduce bruising.
• Judge the result at 6–8 weeks, not earlier; muscle shrinkage is gradual.

Medically reviewed by

Dr. Chang-hyun Kim, M.D.

Board-certified dermatologist and Representative Director of Oaro Dermatology Clinic, Cheongdam. Ulthera Certified Treatment Provider, Thermage FLX Master Certified, and full member of the Korean Dermatological Association, the Korean Society for Dermatologic Laser and the Korean Filler Society.

FAQ

Frequently asked questions

How long does jawline slimming last?

Typically 4–6 months. With repeated treatments the muscle stays smaller for longer and intervals can be stretched.

Will it affect my smile or speech?

No. The masseter is a chewing muscle; smile and speech muscles are not treated.

Can it make my cheeks look hollow?

In patients with little facial fat, over-treatment can create a sunken look, so the dermatologist doses conservatively.

Does it help teeth grinding?

It often does. Reduced masseter force typically lessens grinding, jaw pain and tension headaches.

How soon will I see results?

Softening begins in 2 weeks and visible slimming appears by 4–8 weeks.

Explore related care

Often considered together

• Face Treatments — the full facial treatment menu
• Jawline Contouring Injections — injectables for jawline definition
• Double Chin Treatment — when fat under the chin widens the lower face
• Chin Enhancement — lengthening the chin to complete the V-line
• Injectable Treatments — all injectables at Oaro
• Book a consultation — arrange masseter toxin in Apgujeong, Seoul

Private 1:1 consultation

Plan your treatment with a board-certified dermatologist in Apgujeong

Tell us what you would like to change, and we will examine your skin, explain the options and give you a written plan with clear pricing. English-speaking coordinators are available for international patients.