A sleek, tapered jawline — often described as the “V-shape face” — is one of the most desirable facial profiles today. More patients are turning to Botox for V-shape face to contour their jawline safely and effectively without surgery.

This medically grounded guide explains how it works, what to expect, how experts inject, and the science behind dosage and results over six months.

Understanding the Masseter and the Square Jaw

The masseter is a large chewing muscle connecting the cheekbone to the jawbone. When overdeveloped, it creates a square or bulky appearance at the lower face.

Common causes of masseter hypertrophy include:

• Habitual teeth grinding (bruxism)

• Frequent gum chewing or tough diets

• Genetic facial structure

• Stress-related clenching

Botox for V-shape face works by relaxing these muscles to slim the lower face into a softer contour — achieving the coveted V-line without bone surgery.

What Is Botox for V-Shape Face and How It Works

Botox for V-shape face involves injecting small doses of botulinum toxin type A into each masseter muscle. Once the toxin blocks nerve impulses, the muscle gradually weakens and shrinks over time.

For official medical information about botulinum toxin, visit the Botox® Medical Information site.

Masseter Size Over Time After Botox Injection (1–6 Months)

Clinical studies have consistently documented a gradual and measurable reduction in masseter thickness following injection.

Repeated treatments at 4–6 months lead to cumulative thinning and often longer-lasting results.

Ultrasound imaging confirms that consistent sessions produce a 20–35 % sustained reduction in cross-sectional area after one year.

Who Is a Good Candidate for Botox for V-Shape Face

✅ Suitable Candidates

• Individuals with visible jaw bulging when clenching.

• Those seeking non-surgical lower face slimming.

• Patients with TMJ tension or bruxism.

• People willing to repeat treatments every few months.

❌ Unsuitable Candidates

• Those whose wide face is due to bone width rather than muscle.

• Pregnant or breastfeeding women.

• Patients with neuromuscular disorders or on aminoglycoside antibiotics.

Expert Masseter Injection Techniques

Delivering consistent, natural results from Botox for V-shape face depends on a precise understanding of anatomy and technique.

1. Standard Deep Intramuscular Technique

• Needle: 30G–32G, 13 mm length.

• Depth: 6–10 mm into the thickest masseter portion.

• Points: 3–5 evenly spaced per side.

• Benefit: Directly targets muscle belly; highly effective for hypertrophy.

• Limitation: Greater risk of bruising if superficial vessels are hit.

2. Multi-Point “Grid” Technique

• Several low-dose injections (5–8 points per side) mapped like a grid.

• Ensures even diffusion and avoids over-relaxation in one zone.

• Common in East Asian aesthetic practice where subtle shaping is preferred.

3. Ultrasound-Guided Technique

• Uses real-time imaging to visualize muscle boundaries and depth.

• Enables precise placement, reducing risk to parotid gland and facial nerve.

• Particularly useful for asymmetric or very thick masseters.

Experienced injectors often blend these techniques depending on the patient’s anatomy.

Botox Units for Masseter (20U, 30U, 40U) and Safety

The correct dosage determines both the aesthetic outcome and complication rate of Botox for V-shape face.

*Based on published clinical audits (≥200 patients, 2020–2023).

Key clinical insight:

• Complications are dose-dependent, but still temporary and self-limiting.

• Most patients adapt within a week even at 40 U doses.

• Using divided doses (e.g., 15–20 U each side initially, followed by touch-up) minimizes risk while ensuring symmetry.

Treatment Timeline and Expected Results

The transformation after Botox for V-shape face unfolds gradually.

Botox for V-Shape Face Timeline

Risks and Safety Considerations

Even though Botox for V-shape face is minimally invasive, careful technique ensures safety.

Common Minor Effects

• Localised bruising or swelling (resolves within days).

• Mild jaw fatigue or chewing weakness (1–2 weeks).

Less Common

• Smile asymmetry if the risorius or zygomaticus muscles are affected.

• Uneven reduction causing temporary jaw imbalance.

• Rare muscle herniation (“bulging”) due to uneven toxin spread.

Safety Practices

• Treat only by licensed medical doctors trained in facial anatomy.

• Use conservative first-session doses (≤30 U/side) to assess response.

• Re-evaluate at 8 weeks for symmetry and adjust dose if required.

• Avoid massaging or pressing the area for 24 hours post-injection.

Combining Botox for V-Shape Face with Other Treatments

To refine the facial silhouette, doctors often pair masseter Botox with:

• HIFU or radiofrequency tightening for jawline definition.

• Dermal fillers to lift the midface and balance proportions.

• Chin enhancement for improved lower-face projection.

When combined, these modalities can amplify the V-line effect while keeping results natural.

Aftercare and Maintenance

To sustain your V-shape face:

• Schedule maintenance every 4–6 months.

• Avoid chewing excessively hard foods early on.

• Manage stress and bruxism to prevent re-hypertrophy.

• Track progress with clinical photos or ultrasound to monitor size regression.

After several consistent sessions, the masseter often remains slimmer even with less frequent injections.

Frequently Asked Questions

1. How many sessions are needed?

Usually two sessions per year; some patients require three in the first year for optimal tapering.

2. Does Botox affect chewing permanently?

No — any chewing fatigue is temporary. Strength returns gradually as nerve function regenerates.

3. How long do results last?

About 4–6 months after the first treatment, extending to 6–9 months after repeated sessions.

4. Can Botox for V-shape face help with jaw pain or teeth grinding?

Yes. It reduces tension and clenching associated with bruxism, offering both aesthetic and functional relief.

Why Choose a Qualified Doctor

The difference between a beautiful contour and an unnatural one lies in expertise.

An experienced injector:

• Evaluates facial symmetry and muscle balance.

• Customizes dose (20 U – 40 U per side) according to anatomy.

• Employs advanced multi-point or ultrasound-guided techniques for precision.

• Monitors outcomes with medical imaging or photographic comparison.

At Nee Soon Clinic, qualified doctors offer personalised treatment plans designed for natural, safe, and long-lasting results.

Summary Table

Conclusion: Sculpted Confidence with Precision

Botox for V-shape face remains one of the most effective non-surgical approaches for refining the jawline.

By understanding the anatomy, correct dosage, and expert injection technique, clinicians can achieve elegant results with minimal risk.

The key lies in precision — the right units, the right depth, and the right injector.With consistent treatment and care, patients can enjoy a naturally slimmer, beautifully balanced face that enhances confidence from every angle.

Disclaimer:The information provided in this article is for informational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. The content is not intended to be a comprehensive source of information and should not be relied upon as such. Reliance on any information provided in this article is solely at your own risk. The authors and the publisher do not endorse or recommend any specific tests, physicians, products, procedures, opinions, or other information that may be mentioned in the article. Any reliance on the information in this article is solely at the reader's own risk.