A strong, overactive jaw muscle can change the shape of the lower face and create daily discomfort. Masseter Botox® is a specialized injectable treatment that relaxes the masseter muscles to reduce clenching, grinding, tension headaches, and jaw soreness. Over time, this also refines a bulky or square lower face, creating a softer, more tapered jawline while preserving a natural look. At The Serenity MedSpa, Masseter Botox® is performed with a conservative, anatomy-driven approach under expert medical oversight. Our goal is to improve comfort and facial balance without over-relaxation or unwanted changes in your smile or chewing function.
Masseter Botox® is the injection of a neuromodulator (such as Botox®) into the masseter muscles at the angle of the jaw. When the masseter is overactive—often from clenching or grinding—it can become enlarged (hypertrophy). Relaxing the muscle reduces excessive contraction, relieves tension, and gradually decreases the muscle’s bulk.
At The Serenity MedSpa, Masseter Botox® is commonly used for:
Jaw clenching and teeth grinding (bruxism)
TMJ-related muscle tension and discomfort
A wide or square lower face caused by enlarged masseters
Facial imbalance where the lower third appears heavy
Masseter Botox® treatments at The Serenity MedSpa provide both functional and aesthetic benefits, including:
You may be an ideal candidate for Masseter Botox® at The Serenity MedSpa if you:
Clench your jaw during the day or at night
Grind your teeth (often noticed by a dentist or partner)
Wake up with jaw soreness, tightness, or tension headaches
Feel your jaw looks wide or bulky, especially near the angles
Want a non-surgical way to slim and contour the lower face
Are in good general health and not pregnant or breastfeeding
An in-person consultation with our medical team is essential because not all jaw fullness is muscle-related. In some instances, lower-face width is determined by bone structure or soft tissue, which requires a completely different approach.
Your appointment begins with an assessment of:
Muscle size and symmetry
Bite mechanics and clenching patterns
Facial proportions and lower-face balance
Injections are placed precisely into the masseter muscle on each side. Treatment typically takes 10–20 minutes. Discomfort is minimal and most patients describe it as quick pinches.
After treatment, you can return to normal activity right away.
There is little to no downtime. You may notice:
Mild tenderness at injection sites
Temporary swelling or small bumps for a few hours
Occasional bruising
We recommend avoiding:
Rubbing or massaging the area for the rest of the day
Strenuous exercise for 24 hours
Lying flat for a few hours after treatment (as advised)
Masseter Botox® has two types of benefits, each on a different timeline:
Functional relief (clenching/tension): often begins within 1–2 weeks.
Jaw slimming/contour refinement: develops gradually over 4–8 weeks as the muscle reduces in size.
Results typically last 4–6 months. With consistent treatment, some patients find results last longer over time because the muscle remains less hypertrophic.
When performed by experienced providers with strong anatomical knowledge, Masseter Botox® is safe and well tolerated. Potential side effects include:
Temporary tenderness, swelling, or bruising
Temporary chewing fatigue (usually mild and short-lived)
Asymmetry (uncommon and correctable)
Smile changes if product diffuses into nearby muscles (rare with proper technique)
Our emphasis on clinical expertise and precise placement minimizes these risks—ensuring optimal safety in the lower face.
Most patients tolerate it very well. The injections are quick, and discomfort is minimal.
The goal is a natural refinement. Any slimming occurs gradually and should look like your face—just more balanced.
Yes. You may notice mild chewing fatigue for a short period, especially with very chewy foods, but normal function is preserved with conservative dosing.
Units vary based on muscle strength and anatomy. This is determined during your consultation.
It can reduce muscle-related tension and clenching that contributes to TMJ discomfort. It does not change joint structure, but many patients experience meaningful relief.
Most patients repeat treatment every 4–6 months depending on return of clenching and desired contour.
Yes. It is commonly combined with facial balancing, dermal fillers, and other neuromodulator treatments when appropriate at The Serenity MedSpa.
At Serenity MedSpa, our skilled and experienced medical professionals blend cutting-edge technology with expert care to help you achieve your ideal look. We’re dedicated to offering a wide range of services in one convenient location—enhancing your confidence and helping you look and feel your absolute best.
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