Does your face appear wider or more angular because of a square jaw, giving you a stronger appearance than you’d like?

If the appearance of a square jaw is caused by enlarged masseter muscles rather than the underlying bone structure, cosmetic masseter Botox may help create a softer, slimmer facial contour without surgery. For patients with a muscle-dominant square jaw, properly administered Botox is a popular non-surgical treatment that can naturally refine the appearance of the lower face.

However, even when the same Botox product is used, results can vary significantly. The outcome depends on how carefully the physician evaluates your facial proportions, masseter muscle size, facial symmetry, and overall face shape—as well as how precisely the appropriate dose is injected into the correct areas.

For this reason, when it comes to cosmetic masseter Botox, the physician’s experience and knowledge of facial anatomy are just as important as the product itself.

BMB Medical has more than 17 years of clinical experience providing Botox treatments and jaw muscle (TMJ) treatment in Los Angeles. Walter Kim, M.D., has extensive experience administering Botox and personally performs every Botox treatment at BMB Medical, earning the continued trust of many patients over the years.

At BMB Medical, our goal is not simply to make the face look smaller. We carefully evaluate each patient’s facial shape and proportions, degree of masseter muscle development, and facial symmetry to create a natural, balanced, and harmonious facial contour.

What Is Masseter Botox?

Masseter Botox is a treatment in which botulinum toxin is injected into the enlarged masseter muscles to temporarily reduce excessive muscle activity.

The masseter is an important muscle used for chewing. However, habits such as clenching the teeth, teeth grinding, frequently eating hard or chewy foods, or naturally prominent muscle development can cause the masseter muscles to become enlarged. This may make the jaw appear wider and more angular and can give the overall face a broader appearance.

Botox temporarily reduces the nerve signals responsible for muscle contraction, helping relax excessive masseter activity. Over time, the enlarged muscles may gradually decrease in volume, allowing the jawline to develop a softer, slimmer appearance.

Cosmetic Masseter Botox Results — A Slimmer, More Refined Facial Appearance

Botox does not change the appearance of the face immediately after treatment.

In general, the masseter muscles begin to gradually decrease in size approximately 2–4 weeks after treatment, with more noticeable and natural-looking changes typically developing after about 1–2 months.

Depending on the individual, potential benefits may include:

• A softer appearance to a previously angular jawline
• A slimmer, more refined facial appearance
• Reduction in the size of enlarged masseter muscles
• More balanced facial contours
• Reduced tension in the jaw muscles

Patients whose square jaw appearance is primarily caused by enlarged masseter muscles may see more noticeable improvement. Results can vary depending on individual facial structure and the degree of muscle development.

How Long Do the Results Last?

The effects of cosmetic masseter Botox generally last approximately 4–6 months.

As the effects of Botox gradually wear off, the masseter muscles begin to regain their normal function. Depending on the individual, maintenance treatments every 4–6 months may be considered to help maintain the desired results.

Why Choose BMB Medical?

Cosmetic masseter Botox is more than simply an aesthetic treatment. It is a medical procedure that requires a detailed understanding of facial anatomy and muscle function.

With more than 17 years of clinical experience providing Botox and TMJ treatments in Los Angeles, BMB Medical offers personalized treatment plans based on each patient’s individual facial anatomy and goals.

Every Botox treatment is personally performed by Walter Kim, M.D. From consultation and evaluation to treatment and follow-up care, Dr. Kim oversees the entire process. He carefully evaluates facial proportions, masseter muscle development, and left-to-right symmetry to achieve results that look natural and harmonious.

At BMB Medical, our goal is not simply to make the jaw appear smaller. Our goal is to enhance each patient’s unique features while creating a more refined and balanced facial contour.

Natural-looking beauty begins with an accurate evaluation.

More than 17 years of clinical experience.
Personalized Botox treatments performed directly by a physician.
Extensive knowledge of facial anatomy and precise injection techniques.

These are some of the reasons patients choose BMB Medical for Botox treatment in Los Angeles.

BMB Medical Group

450 S Western Ave #206

Appointments: 323-965-9650

All procedures performed by a physician.