A widened lower-face outline created or worsened by masseter muscle bulk may be assessed.
03
Facial Contour & Muscle Balance
Treatment Series
Treatment Series
Jaw Slimming Botox
A consultation-led botulinum-toxin treatment for a selected enlarged or overactive masseter muscle, planned around jaw contour, chewing strength, clenching pattern and individual facial anatomy.
Jaw slimming treatment should not aim to eliminate chewing strength entirely. Excessive weakening can affect eating comfort, create an unnatural hollow appearance or take considerable time to resolve.
Function-Preserving Treatment
Bite strength and comfortable chewing ability influence the treatment plan.
Visible slimming develops over several weeks as muscle bulk gradually reduces.
The plan aims to soften a square angle without promising a dramatically narrowed jaw.
What Is Jaw Slimming Botox?
A muscle-relaxing treatment for an overactive jaw muscle.
A squarer or wider lower face can be associated with an enlarged masseter muscle, the muscle used for chewing. Botulinum toxin temporarily reduces selected nerve signals to carefully chosen parts of this muscle.
The objective is not necessarily to create the narrowest possible jaw. Treatment should preserve enough muscle function to support comfortable chewing and a balanced facial proportion.
Some patients habitually clench or grind their teeth, which can enlarge and strengthen the masseter over time. Treating this muscle too strongly can reduce chewing comfort or create an unnatural hollow appearance in the lower cheek.
Existing bone structure, muscle bulk, clenching habit, facial asymmetry and previous toxin response all affect placement and amount.
Jaw contour and chewing strength must be assessed together.
The masseter muscle supports daily chewing while also shaping the lower-face outline. Treatment should balance these functions rather than pursuing contour reduction alone.
Temple muscle
Masseter muscle
Jaw angle
Muscle-Balance Assessment
Bulk 01
Habit 02
Structure 03
Function 04
The jaw is part of a functional chewing system.
The doctor observes the face at rest and during clenching, chewing and natural expression before selecting injection points across the masseter muscle.
Masseter Size
Muscle thickness at rest and during clenching influences the degree of contour change that may be achieved.
Clenching Pattern
Habitual clenching or teeth grinding may require different dosing than an already-relaxed jaw muscle.
Bone Contribution
A wide lower face may reflect bone structure as well as muscle bulk, which affects expected results.
Chewing Strength
Bite force and chewing comfort must remain adequate after treatment for daily eating function.
Concerns Commonly Discussed
Similar jaw concerns can require different treatment plans.
Muscle bulk, bone structure, clenching habit and facial proportion determine whether toxin alone or a combination approach may be considered.
Square Lower Face
A visibly wide or square jaw outline, most noticeable when clenching, may respond to masseter-focused treatment.
Muscle-driven concernJaw Clenching & Tension
Habitual clenching or grinding can be associated with an overactive jaw muscle and a tense, tired jaw sensation.
May relate to teeth grindingAsymmetric Jaw Muscle
One masseter may be naturally larger or more active than the other, affecting facial balance.
Perfect symmetry is not guaranteedBone-Dominant Wideness
When the jaw angle is primarily formed by bone rather than muscle, toxin alone may achieve limited change.
Expectations should be discussedNighttime Grinding
Bruxism during sleep may contribute to muscle enlargement, jaw fatigue and morning discomfort.
Cause influences treatmentLower-Cheek Volume Loss
Repeated high-dose treatment over years may thin the muscle enough to affect lower-cheek fullness.
Combination care may be discussed Treatment Philosophy
The appropriate result is not the narrowest result.
Jaw slimming treatment should be adjusted to muscle bulk, clenching pattern, bone contribution and the chewing comfort the patient wishes to preserve.
Balanced Treatment
A personalised pattern designed to soften the jaw angle while maintaining appropriate chewing strength.
Individual muscle mapping
Chewing function considered
Contour change reviewed over weeks
Response reviewed before repeating
Preferred focus: balance
Over-Relaxed Jaw
Excessive weakening may reduce chewing comfort and, over repeated treatments, create a hollow lower-cheek appearance.
Chewing may feel less efficient
Lower cheek may appear sunken
Jaw shape may look unnaturally narrow
Effect cannot be immediately reversed
Risk focus: excessive weakening
Conservative Treatment
A lighter approach may be selected when chewing strength, first-time treatment or gradual change is a priority.
More chewing power may remain
Contour change may be more subtle
Lower risk of unwanted hollowing
Adjustment follows clinical review
Planning focus: conservative balance
LOUAVE Treatment Process
Treatment begins with clenching—not a standard pattern.
The jaw is assessed at rest and during clenching before product selection, placement and aftercare are confirmed.
Consultation
Goals, medical history, medicines, allergies, previous toxin treatment and earlier complications are reviewed.
Medical suitability assessmentClenching Assessment
The doctor observes and palpates the masseter during rest and firm clenching to map muscle bulk and boundaries.
Palpation-led planningPrecise Injection
Selected points are cleansed and treated according to muscle bulk, boundary and the desired amount of reduction.
Placement and amount varyReview Guidance
Expected timeline, temporary effects, warning symptoms and the appropriate review period are explained.
Avoid immediate over-correction Results & Development
Treatment Day
Early Weeks
Contour Period
Clinical Review
Contour change develops gradually over several weeks.
The jaw usually looks unchanged immediately after injection. Visible slimming develops as muscle bulk gradually reduces, while the final contour should be judged only after the response has had time to settle.
Small injection marks may appear
Temporary redness, tenderness, mild swelling, pinpoint bruising or localised soreness while chewing may occur.
Muscle strength begins changing
Clenching strength may gradually reduce before any visible contour change becomes noticeable.
Jaw outline becomes clearer
Visible slimming typically develops over four to eight weeks as muscle bulk continues to reduce.
Further treatment is reassessed
Additional toxin should not be added prematurely before the full contour response is properly evaluated.
International patients should allow enough time for contour change to develop before requesting adjustments or leaving Seoul.
Suitability & Screening
Jaw slimming requires individual patient selection.
Treatment may be modified, delayed or declined when muscle bulk, bone structure, health history, previous reactions or expectations make the proposed plan unsuitable.
Jaw Slimming Botox may be discussed when:
- An enlarged or overactive masseter muscle contributes to a visibly square lower face.
- Clenching, teeth grinding or jaw tension is present alongside contour concerns.
- You understand that bone structure may limit how much narrowing is achievable.
- You prefer a temporary, non-surgical treatment approach.
- Your expectations are compatible with gradual, individual results developing over weeks.
Tell the doctor before treatment about:
- Pregnancy, planned pregnancy or breastfeeding.
- Neuromuscular conditions, swallowing difficulty, breathing problems or significant muscle weakness.
- Infection, inflammation, open wounds or skin disease near the proposed injection area.
- Blood-thinning medicines, muscle relaxants, antibiotics or other relevant medicines and supplements.
- Previous toxin treatment, jaw surgery, facial weakness, TMJ disorder or earlier adverse reactions.
Aftercare
Allow the contour to settle without unnecessary pressure.
Follow the instructions provided by the treating doctor. Advice may vary according to the product, injection pattern, medical history and treatment combination.
Avoid Rubbing
Do not aggressively rub, massage or press the treated jaw area unless specifically instructed.
Ease Chewing Load
Consider softer foods and avoid excessive gum chewing for the first few days after treatment.
Allow Gradual Development
Do not judge contour or request additional treatment before the response has had weeks to settle.
Report Unexpected Symptoms
Contact the clinic for significant facial weakness, an asymmetric smile, chewing difficulty or another concerning change.
Safety Information
Unexpected weakness requires medical assessment.
Mild injection-site reactions can occur. Significant facial weakness, an asymmetric smile or symptoms beyond the treated area should be reported.
Contact the clinic or seek urgent care for:
- Significant or worsening facial weakness or an asymmetric smile.
- Marked difficulty chewing, biting or controlling facial movement.
- Eye pain, double vision, blurred vision or another unexpected visual symptom.
- Increasing redness, heat, discharge, fever or another sign of infection.
- Difficulty swallowing, speaking or breathing, or widespread muscle weakness.
Breathing difficulty, swallowing difficulty, widespread weakness or a severe allergic reaction requires emergency medical attention.
Frequently Asked Questions
Questions about jaw slimming Botox.
Product, placement, amount, expected timeline and suitability are confirmed during consultation.
How does jaw slimming Botox work?
Botulinum toxin temporarily reduces selected nerve signals to parts of the masseter muscle. As the muscle gradually reduces in bulk, the lower-face outline may appear softer and less square.
Is this the same as jaw-reduction surgery?
No. This is a temporary, non-surgical muscle treatment. It does not alter bone structure, so results differ from surgical jaw reduction and are not permanent.
Will treatment make my jaw weak?
The intended amount of muscle reduction depends on your muscle bulk, clenching pattern and preference. Treatment should preserve enough function for comfortable chewing rather than eliminating it.
Will this help my teeth grinding?
Some patients notice reduced clenching intensity as the masseter relaxes, but this treatment is not a guaranteed cure for bruxism and should be discussed alongside dental evaluation.
When may I notice a change?
Muscle strength typically begins changing within one to two weeks, while visible contour change usually develops over four to eight weeks.
How long will the result last?
Duration varies according to product, muscle bulk, treatment amount, metabolism, previous treatment and individual response. Repeat treatment is usually needed to maintain the contour.
Will Botox fix a jaw that is wide because of bone?
When bone structure is the main contributor to jaw width, toxin alone may achieve limited visible change. This should be discussed honestly during consultation.
Can repeated treatment cause a hollow lower cheek?
Over years of repeated high-dose treatment, significant muscle thinning may contribute to a sunken lower-cheek appearance in some patients. Dosing is reviewed at each visit to help manage this risk.
Can I receive more toxin if my jaw still feels wide?
Remaining muscle bulk should be reviewed only after the initial response has fully settled, generally at least eight weeks. Immediate additional treatment may increase the risk of unwanted weakness.
What side effects may occur?
Temporary redness, tenderness, swelling, bruising or soreness while chewing may occur. Other possible effects include asymmetry, an asymmetric smile, chewing fatigue, unwanted weakness or, rarely, facial muscle spread.
International Appointment
Plan jaw slimming Botox around your natural chewing function.
Share the jaw contour you want to discuss, clenching or grinding habits, previous botulinum-toxin treatment, relevant medical information, preferred appointment dates and your Seoul travel schedule. Final product, placement and amount are confirmed after in-person assessment.
Important treatment information
This page provides general educational information and does not replace an individual medical consultation. Botulinum-toxin products have product-specific formulations, indications, contraindications, storage requirements and regulatory status that may vary by country. Products and treatment amounts should not be treated as directly interchangeable. Treatment must be selected and performed by an appropriately qualified medical professional after reviewing facial anatomy, muscle bulk, bone structure, chewing function, health history, medications, allergies, previous procedures and informed consent. Temporary effects may include injection-site pain, redness, swelling, tenderness, bruising or soreness while chewing. Other possible effects include asymmetry, an asymmetric smile, chewing fatigue, reduced bite strength or unwanted weakness. Repeated high-dose treatment over time may contribute to lower-cheek hollowing in some patients. Rare spread of toxin effect may cause weakness beyond the treated area, swallowing difficulty, speaking difficulty or breathing difficulty. Seek urgent medical care for breathing or swallowing difficulty, widespread weakness, severe allergic symptoms or significant visual or neurological changes. Results, symmetry, amount of contour change, onset, duration and maintenance requirements vary and cannot be guaranteed. When jaw width is primarily caused by bone structure, results from this treatment may be limited.