Botox masseter injections do two things at once — they slim a square jawline and stop teeth clenching that keeps you up at night. At Miami Lakes Med Spa, this is one of our most-requested treatments for patients across Miami Lakes, Hialeah, Miami Gardens, and Doral who want a softer face shape and real jaw pain relief.
If you wake up with a sore jaw, grind your teeth at night, or feel like your face looks too square in photos, you’re not alone. Dr. Sabrina Gonzalez, DNP, APRN sees these concerns daily. The good news? One quick visit can fix both at the same time.
This guide covers what jaw slimming botox actually does, what the visit feels like, when you’ll see results, and how much it costs at our clinic. Let’s get into it.
TL;DR
Botox masseter injections relax the jaw muscle to soften a square jawline and stop teeth clenching or grinding. Most patients see slimming in 4-8 weeks. At Miami Lakes Med Spa, the treatment falls under our Lower Face flat-rate package at $595.
Key Takeaways
- Botox masseter shrinks the jaw muscle over 4-8 weeks for a slimmer, more oval face shape.
- The same shot stops clenching and grinding, which means less jaw pain and fewer morning headaches.
- At Miami Lakes Med Spa, masseter Botox is part of our Lower Face package at a flat $595 with free 2-week touch-up.
- Results last 4-6 months. Most patients return 2-3 times a year to keep results steady.
- There’s no real downtime. You can go back to work right after your visit.
Clinical Summary
- Treatment: Botox Cosmetic (onabotulinumtoxinA) injected into the masseter muscle
- Best for: Adults with a square jawline, teeth clenching, grinding (bruxism), or TMJ tension
- Session length: 15-20 minutes
- Pain level: Mild — feels like quick pinches
- Downtime: None — return to normal activities right away
- Results timeline: Clenching relief in 1-2 weeks; visible slimming in 4-8 weeks
- Duration: 4-6 months per session
- Cost at Miami Lakes Med Spa: $595 (part of Lower Face flat-rate package)
- Common risks: Mild bruising, brief soreness, rare chewing fatigue
- Not for: Pregnant or nursing patients, those with certain neuromuscular conditions
How Botox Masseter Works for Jaw Slimming and Clenching
The masseter is the thick muscle on the side of your jaw. You can feel it pop out when you bite down hard. For some people, this muscle gets overgrown — either from genetics, chronic clenching, or both. The result is a square, wide lower face.
Botox Cosmetic (onabotulinumtoxinA) is a neuromodulator. When injected into the masseter, it blocks the nerve signals that tell the muscle to contract. The muscle can’t clench as hard, so it slowly shrinks from less use. Think of it like a bicep that gets smaller when you stop lifting.
This shrinking is what gives you a slimmer jawline. And because the muscle can’t grip as hard, the clenching and grinding stop too. That means less jaw pain, fewer tension headaches, and better sleep.
Botox for clenching is also called masseter reduction or TMJ Botox. It’s the same treatment under different names. Dysport and Xeomin are other botulinum toxin type A products that work the same way, though we use Botox Cosmetic most often at our clinic.
Who’s a Good Fit for Jaw Slimming Botox
You may be a strong candidate if you:
- Have a square or wide lower face you’d like to soften
- Wake up with jaw soreness or morning headaches
- Grind your teeth at night (your dentist may have told you this)
- Feel jaw tension during the day from stress
- Have worn down or cracked teeth from grinding
- Want a more oval, V-shaped face without surgery
You may not be a fit if you’re pregnant, breastfeeding, or have certain neuromuscular conditions. During your free consultation, Dr. Sabrina Gonzalez or our medical director Dr. John Serpa, MD will review your health history to confirm you’re safe to treat.
One thing to know — if your jaw width comes mostly from bone, not muscle, Botox won’t change the shape. That’s why the consultation matters. We’ll palpate the muscle while you clench to see how much of your jaw width is muscle versus bone.
What the Treatment Visit Looks Like
Your visit at our Miami Lakes office is fast and easy. Here’s the play-by-play:
Check-in and prep (5 minutes): We clean the skin on both sides of your jaw with an antiseptic. Numbing cream isn’t usually needed because the shots are quick and shallow.
Mapping the points (2-3 minutes): Dr. Sabrina has you clench your teeth so she can feel the borders of the masseter. She marks 2-3 injection points on each side to spread the product evenly.
The injections (5-7 minutes): Each shot feels like a quick pinch. You’ll get a total of 4-6 small injections — usually 2-3 per side. The needle is very small and goes into the muscle, not the skin.
Aftercare review (2 minutes): We go over what to do for the next 24 hours. That’s it — you’re out the door.
Most patients come on their lunch break and head back to work. There’s no bandage, no redness to hide, and no need to call out for the day.
Realistic Timeline and Results
Botox masseter results show up in two stages. Knowing this helps set the right expectations.
Week 1-2 — Clenching stops first. The muscle starts to relax within a few days. Most patients notice less jaw tension and fewer morning headaches by day 7-10. If you grind your teeth, your bed partner may notice the noise stops first.
Week 4-8 — Visible slimming. The muscle shrinks gradually from less use. This is when you’ll see the jaw look slimmer in the mirror and in photos. Friends often comment that you look “refreshed” without knowing why.
Month 4-6 — Time for a touch-up. Results last about 4-6 months. With repeat treatments, the muscle stays smaller for longer, and many patients can stretch to 6+ months between visits.
Side effects are usually mild — small bruises at the injection sites, brief soreness, or temporary chewing fatigue with tough foods like steak or bagels. These all clear up within a few days. Serious side effects are rare when the treatment is done by a trained provider.
Cost and Why Our Pricing Is Different
Most clinics charge per unit for masseter Botox. Since the masseter needs 40-60 units per side (sometimes more), the bill can easily hit $800-$1,200 — and you don’t know the total until they’re done injecting.
We do it differently. At Miami Lakes Med Spa, jaw slimming botox falls under our Lower Face flat-rate package at $595. That includes the masseter plus any other lower face areas you want treated — chin dimpling, jawline, DAO (the muscles that pull your mouth corners down), or neck bands. One flat price, unlimited units.
If you also want forehead, frown lines, or crow’s feet treated, our Full Face package at $1,095 covers everything top to bottom. A free 2-week touch-up is included with every treatment, so if anything needs tweaking, we’ve got you covered at no extra cost.
Financing is available through Cherry, CareCredit, and Klarna if you’d rather spread the cost out.
Botox masseter is one of the most rewarding treatments we offer — patients walk in tired of jaw pain and a wide face, and walk out months later with both fixed. If you’ve been thinking about jaw slimming botox or Botox for clenching, the next step is simple: book a free consultation.
Dr. Sabrina Gonzalez and our team at Miami Lakes Med Spa serve patients from Miami Lakes, Hialeah, Miami Gardens, Miramar, Pembroke Pines, and Doral. Call us at 305-418-0392 or book online to come in and see if you’re a fit. We’re open Tuesday through Saturday, 10 AM to 5 PM, at 7980 NW 155th St, Suite A, Miami Lakes, FL 33016.
Medical disclaimer: This content is for informational purposes only and is not a substitute for professional medical advice. Individual results may vary. Please consult with a qualified provider to discuss whether this treatment is right for you. Last reviewed: 2026.
Frequently Asked Questions
Does Botox masseter hurt?
Not much. Most patients say it feels like 2-3 quick pinches per side. The needle is very small, and the whole injection process takes about 5-7 minutes. Numbing cream isn’t usually needed. If you’re nervous, just tell Dr. Sabrina — we can apply topical numbing on request.
How long until I see jaw slimming?
Clenching relief shows up first, usually within 1-2 weeks. Visible slimming takes 4-8 weeks as the muscle shrinks from less use. The full effect peaks around the 8-week mark. Some patients with very large masseters need a second session at 3 months to reach their goal shape.
Will my face look weird or sunken?
No, when done right. Dr. Sabrina uses a conservative dose mapped to your specific muscle size and goals. The look should be softer and more oval — not gaunt. That’s why we focus on natural, balanced results at Miami Lakes Med Spa, not overdone changes.
Can I still chew normally after Botox for clenching?
Yes. You’ll still chew normally for everyday foods. Some patients notice brief chewing fatigue with very tough foods like steak or bagels in the first 2-3 weeks. This passes as your muscles adjust. Your bite stays normal — only the muscle’s power to clench hard is reduced.
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