Masseter Botox &
Jaw Slimming in Los Angeles
Non-surgical jaw slimming that relieves teeth grinding, TMJ tension, and redefines your facial profile — in under 30 minutes with no downtime.
One Injection. Two Completely Different Reasons to Get It.
The masseter is the large muscle on either side of your jaw responsible for chewing. When overdeveloped — from genetics, chronic teeth grinding (bruxism), or jaw clenching — it creates two distinct problems: a visually wide, square jawline and chronic pain, tension headaches, and TMJ discomfort.
Masseter Botox addresses both simultaneously. A precisely placed injection of botulinum toxin temporarily reduces the muscle's contractile force. Over 2 to 4 weeks, the muscle gradually atrophies — slimming the lower face profile while eliminating the excess pressure that causes grinding and tension.
At Mirror Mirror Med Spa in Los Angeles, our injectors use Botox at $14 per unit, Xeomin at $13 per unit, or Dysport at $6 per unit — with dosing and product selection tailored to your anatomy at consultation.
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Aesthetic Results. Therapeutic Relief.
Most patients come in for one benefit and leave grateful for both.
Jawline Slimming & Facial Contouring
As the masseter muscle reduces in volume over 2 to 6 weeks, the lower face narrows and softens. The result is a more oval, V-shaped facial profile — without surgery, filler, or visible recovery.
- Softens a wide, square jawline
- Creates natural-looking lower face symmetry
- Improves facial proportions between upper and lower thirds
- Results visible from 2 weeks, optimal at 4 to 6 weeks
- Gradual change that looks natural, not sudden
Bruxism, TMJ Relief & Headache Reduction
By reducing the force with which the masseter contracts, Botox significantly lowers the pressure on teeth and the temporomandibular joint — providing relief from grinding damage, jaw pain, and chronic tension headaches.
- Reduces teeth grinding force and enamel wear
- Relieves jaw tightness and TMJ pain
- Decreases tension headaches caused by clenching
- Symptom relief often felt within 3 to 7 days
- Maintains normal chewing, speaking, and expression
What Happens During Your Appointment
Masseter Botox is one of the most efficient procedures we offer. The entire appointment takes under 30 minutes. No anesthesia, no recovery, no restrictions on your day.
Assessment & Muscle Mapping
Your provider palpates the masseter to assess size and determines precise injection points. Dosing is calculated based on muscle mass — typically 20 to 40 units per side.
The Injection
Using an ultrafine needle, small doses are injected into multiple points across the masseter. Most clients describe a brief pinch. The treatment itself takes under 10 minutes.
Immediate Aftercare
No downtime required. Avoid massaging the jaw area for 24 hours and skip strenuous exercise the same day. Return to work and normal activity immediately.
Results Timeline
Therapeutic relief from grinding typically begins within 3 to 7 days. Visible jaw slimming becomes apparent at 2 to 4 weeks and reaches full effect at 4 to 6 weeks.
Neurotoxin Options & Per-Unit Rates
Masseter treatment typically requires 20–40 units per side depending on muscle size. Total cost is determined at consultation. Dysport uses a different unit ratio — your provider calculates the equivalent dose. See full neurotoxin pricing and options.
Book Your ConsultFrequently Asked Questions
Everything you need to know about masseter Botox and jaw slimming at Mirror Mirror Med Spa in Los Angeles.
Most masseter treatments require 20 to 40 units of Botox per side, depending on muscle size. At Mirror Mirror, Botox is $14 per unit, Xeomin is $13 per unit, and Dysport is $6 per unit. Total dosing is assessed at consultation by palpating the masseter. See our full neurotoxin pricing page for detail.
Results typically last 4 to 6 months. As the neurotoxin metabolizes, the muscle gradually regains its contractile strength and original volume. Many clients find that with repeated treatments, the masseter remains somewhat reduced between sessions as it adapts to lower activity levels — meaning less product may be needed long-term.
Most clients report minimal discomfort — a brief pinch at each injection point. Mild soreness at the injection sites for 24 to 48 hours afterward is normal. No topical numbing is required for most patients.
No — when performed correctly, the masseter is reduced in force, not paralyzed. You will still chew, speak, and express normally. The treatment targets over-contraction of the muscle, not its functional range of motion. Choosing an experienced injector is essential to avoid migration into adjacent muscles.
Therapeutic relief from grinding and jaw tension typically begins within 3 to 7 days. Visible jaw slimming becomes noticeable at 2 to 4 weeks and reaches full effect at 4 to 6 weeks as muscle atrophy progresses. The gradual timeline means the change looks natural rather than sudden.
Yes — this is one of the most clinically well-supported uses of masseter Botox. By reducing involuntary jaw contractions during sleep or stress, it directly lowers pressure on teeth and protects enamel from grinding damage. It also relieves associated headaches and facial pain. Many clients who come in for aesthetic jaw slimming find the bruxism relief to be the more transformative benefit. See our guide on surprising uses for Botox.
