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Will A Masseter Injection Make My Face Appear Slimmer?

May 2, 2025

If you’re looking to achieve a slimmer, more contoured face without surgery, masseter injections might be the solution you’ve been searching for. This increasingly popular cosmetic treatment can significantly transform your facial appearance by addressing one specific muscle — the masseter.

Understanding the Masseter Muscle

The masseter is one of the primary muscles of mastication (chewing) and is located at the angle of the jaw. When overdeveloped or enlarged, it can create a square or wide appearance to the lower face. This enlargement can be caused by:

  • Genetics
  • Habitual teeth grinding (bruxism)
  • Jaw clenching due to stress
  • Excessive chewing of tough foods

How Masseter Injections Work

Masseter injections typically use neuromodulators like Botox® or Dysport® to temporarily relax and reduce the size of the masseter muscle. When these substances are injected into the muscle:

  1. The neuromodulator blocks nerve signals that cause muscle contractions
  2. The muscle gradually relaxes and decreases in size over time
  3. This reduction creates a slimmer appearance in the lower face
  4. The jawline appears more contoured and the face shape more oval

The Visual Impact: Will Your Face Actually Look Slimmer?

Yes, for most patients, masseter injections do create a visibly slimmer facial appearance. Here’s what you can expect:

What Results Can You Expect

  • Reduced width at the angle of the jaw: The most noticeable change is a decrease in width at the jawline’s angle
  • More defined jawline: As the masseter shrinks, the jawline often appears more sculpted
  • More oval face shape: For those with a square face shape, the treatment can help create a softer, more oval appearance
  • Facial slimming effect: The overall face may appear slimmer as the lower face narrows

Timeline for Results

It’s important to note that results aren’t immediate:

  • Initial relaxation: You may notice the muscle feeling less tense within 3-7 days
  • Visible slimming: Noticeable facial slimming typically begins at 2-3 weeks
  • Maximum results: The full effect usually develops at 4-6 weeks post-treatment
  • Duration: Results typically last 4-6 months for first-time treatments, with longer-lasting results possible after repeated treatments

Ideal Candidates for Masseter Injections

This treatment works best for individuals who:

  • Have a wide or square jawline due to enlarged masseter muscles
  • Experience jaw tension, pain, or headaches from teeth grinding
  • Desire a more oval or heart-shaped face
  • Want a non-surgical approach to facial slimming
  • Have realistic expectations about results

The Treatment Experience

At Body+Beauty Lab, our masseter injection procedure is quick and relatively comfortable:

  1. Consultation: We’ll assess your facial structure and discuss your aesthetic goals
  2. Mapping: The masseter muscle will be carefully identified, sometimes by asking you to clench your teeth
  3. Injection: Precise amounts of the neuromodulator are injected into specific points of the muscle
  4. Duration: The procedure typically takes just 10-15 minutes
  5. Discomfort: Most patients report minimal pain, describing it as a quick pinch

Beyond Aesthetics: Functional Benefits

In addition to facial slimming, masseter injections offer several functional benefits:

  • Reduced teeth grinding: Relief for those suffering from bruxism
  • Decreased jaw tension: Less jaw clenching and associated discomfort
  • Headache relief: Fewer tension headaches caused by jaw muscle strain
  • TMJ symptom improvement: Potential relief from temporomandibular joint disorder symptoms

Complementary Treatments

To enhance the facial slimming effect, masseter injections can be combined with:

  • Chin filler: To create better proportions and a more defined jawline
  • Cheek fillers: To maintain volume in the mid-face while slimming the lower face
  • Jawline contouring: With fillers to create a more defined jawline
  • Neck treatments: To address fullness under the chin and enhance the jawline’s appearance

Is This Treatment Right for You?

While masseter injections can create impressive facial slimming results, they’re not for everyone. The ideal approach to facial contouring should be personalized to your unique facial structure, aesthetic goals, and medical history.

At Body+Beauty Lab, we provide thorough consultations to determine if masseter injections are the right solution for you. Our expert injectors will assess your facial anatomy and discuss realistic expectations for your results.

Ready to explore how masseter injections could transform your facial appearance? Contact Body+Beauty Lab today to schedule your consultation and learn more about this innovative facial slimming treatment.

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