What Is Masseter Botox?

Masseter Botox is a non-surgical facial contouring treatment that targets the masseter muscles, which are the strong chewing muscles located on both sides of the jaw. When these muscles become enlarged due to genetics, frequent chewing, teeth grinding, or jaw clenching, the lower face can appear wide, square, or heavy.

By injecting Botox into the masseter muscles, muscle activity is temporarily reduced. Over time, the treated muscles gradually become smaller, helping create a slimmer jawline and softer V-line facial contour without surgery.

How Does Masseter Botox Work?

Botox works by temporarily relaxing the masseter muscles. When the muscle is less active, it gradually decreases in size, which can make the jawline appear narrower and more refined.

Masseter Botox does not change the jawbone or remove facial fat. It is most effective when jaw width is caused by muscle bulk. During consultation at Seomyeon One Clinic, the doctor evaluates your muscle size, jawline shape, bite movement, facial proportions, and treatment goals to determine whether Masseter Botox is suitable.

Benefits of Masseter Botox

Masseter Botox is one of the most popular non-surgical facial slimming treatments in Korea because it can improve the lower-face contour with minimal recovery time.

Benefits include:

• Slims enlarged jaw muscles
• Softens a square or wide jawline
• Creates a more refined V-line appearance
• Helps balance lower-face proportions
• May reduce jaw tension from clenching
• Non-surgical treatment
• No incisions or scarring
• Minimal discomfort
• Virtually no downtime
• Gradual, natural-looking results

Many patients choose Masseter Botox because the slimming effect develops slowly, making the facial change look subtle and natural.

Who Is a Good Candidate?

Masseter Botox is ideal for patients whose lower-face width is mainly caused by enlarged masseter muscles.

You may be a good candidate if you:

• Have a wide or square lower face
• Notice bulky jaw muscles when clenching
• Want a slimmer jawline or V-line contour
• Prefer non-surgical facial slimming
• Have jaw tension from clenching or grinding
• Want minimal downtime
• Are not ready for jaw reduction surgery
• Want natural-looking contour improvement

If your jawline width is mainly caused by bone structure or facial fat, Botox alone may provide limited slimming. In those cases, your doctor may recommend other contouring or lifting treatments.

What Happens During the Procedure?

The procedure is quick and usually completed within 10 to 20 minutes.

The doctor first evaluates your jawline, masseter muscle thickness, facial balance, and clenching pattern. Small amounts of Botox are then injected into precise points within the masseter muscles on both sides of the face.

Most patients experience only mild discomfort, and anesthesia is usually not required. After treatment, patients can return to work, shopping, travel, or normal daily activities immediately.

Results and Recovery

Masseter Botox results appear gradually because the treated muscles need time to relax and reduce in size.

Most patients begin noticing subtle changes within 2 to 4 weeks, with more visible slimming usually developing around 6 to 8 weeks. Results typically last around 4 to 6 months, depending on muscle size, chewing habits, dosage, metabolism, and individual response.

There is minimal downtime. Mild tenderness, swelling, or small injection marks may occur temporarily but usually resolve quickly.

Masseter Botox for Jaw Clenching and Teeth Grinding

Masseter Botox may also help reduce excessive jaw muscle activity related to clenching or teeth grinding. By relaxing the masseter muscles, some patients experience less jaw tightness, muscle fatigue, and tension.

However, if you have severe bruxism, TMJ symptoms, jaw pain, headaches, or dental wear, you should also consult a dentist or specialist. Botox can support muscle relaxation, but it may not replace dental or TMJ treatment when bite or joint issues are involved.

Masseter Botox vs Jaw Reduction Surgery

Masseter Botox and jaw reduction surgery are different treatments for different causes of a wide lower face.

Masseter Botox is best for patients with enlarged jaw muscles. It creates gradual slimming by reducing muscle activity and size. Jaw reduction surgery is usually more suitable when the square jaw is caused by prominent bone structure.

Botox is non-surgical, temporary, and has minimal downtime, while surgery can create more dramatic structural changes but requires incisions, recovery, and a longer commitment. Many patients try Masseter Botox first before considering surgery.

Can Masseter Botox Be Combined with Other Treatments?

Yes. Masseter Botox can be combined with other aesthetic treatments for more complete lower-face contouring.

Popular combination treatments include:

• Chin Botox
• Chin Fillers
• Jawline Contouring
• Skin Botox
• HIFU Lifting
• Radiofrequency Skin Tightening
• Fat-Dissolving Injections
• Skin Boosters
• Facial Slimming Treatments

Your doctor will recommend the best combination based on your face shape, muscle size, skin laxity, and desired result.

Why Choose Seomyeon One Clinic?

At Seomyeon One Clinic, Masseter Botox is customized according to each patient’s jaw muscle size, facial proportions, jawline shape, and aesthetic goals. The medical team focuses on natural-looking slimming, balanced facial contouring, and safe injection technique.

Conveniently located in central Busan, One Clinic welcomes both Korean residents and international patients seeking non-surgical jawline slimming and facial contouring.

Seomyeon One Clinic
6F, Inje Medical New Building
785 Gayadae-ro, Busanjin-gu, Busan, Korea

Frequently Asked Questions

What is Masseter Botox?

Masseter Botox is a non-surgical treatment that relaxes the masseter muscles, which are the chewing muscles on both sides of the jaw. It is commonly used for jawline slimming, square jaw reduction, V-line contouring, and jaw tension caused by clenching.

How does Masseter Botox slim the jawline?

Botox reduces activity in the masseter muscles. As the muscles become less active, they gradually decrease in size, which can make the lower face appear slimmer, softer, and more V-line.

Who is a good candidate for Masseter Botox?

Good candidates are patients whose wide or square jawline is caused mainly by enlarged masseter muscles rather than bone structure. If your jaw muscles become visibly bulky when you clench, Masseter Botox may be suitable.

When will I see Masseter Botox results?

Most patients begin noticing subtle changes within 2 to 4 weeks. More visible jawline slimming usually develops around 6 to 8 weeks as the masseter muscles gradually reduce in size.

How long does Masseter Botox last?

Results usually last around 4 to 6 months depending on muscle size, dosage, chewing habits, metabolism, and individual response. Maintenance treatments can help preserve a slimmer jawline.

Is Masseter Botox painful?

Most patients experience only mild discomfort because very fine needles are used. The procedure is quick and usually completed within 10 to 20 minutes.

Is there downtime after Masseter Botox?

There is minimal downtime. Most patients return to work, travel, and normal daily activities immediately after treatment. Mild tenderness or small injection marks may occur temporarily.

Can Masseter Botox help teeth grinding?

Masseter Botox may help reduce jaw muscle tension caused by clenching or grinding. However, patients with severe bruxism, TMJ symptoms, jaw pain, or dental problems should also consult a dentist or specialist.

Can Masseter Botox reduce jawbone size?

No. Masseter Botox does not change the jawbone. It only reduces the size and activity of the masseter muscles. Patients with a bone-related square jaw may need other treatment options.

Where can I get Masseter Botox in Busan?

Masseter Botox is available at Seomyeon One Clinic in Busan, located at 6F, Inje Medical New Building, 785 Gayadae-ro, Busanjin-gu, Busan, Korea.