Tense jaw? Grinding your teeth at night? Or maybe you’ve simply noticed your border jawline looking a little heavier than you’d like. You’re not alone, and that’s exactly why Masseter Botox, also known as Jawtox, has become one of the fastest-growing non-surgical treatments in facial aesthetics. In fact, searches for “Jawtox” have seen dramatically increased interest online. 

Performed by Dr. Onir Spiegel, one of the most sought-after aesthetic injectors at The Spiegel Center, this treatment offers a refined, elegant way to relax the jaw muscles, sculpt the lower face, and ease tension — all without downtime.

What Is Masseter Botox?

Masseter Botox (also called Jawtox or jawline slimming injections) involves strategically injecting Botox into the masseter muscles — the strong chewing muscles beside your jaw. Over time, stress, teeth-grinding (bruxism), or genetics can make those muscles grow larger, giving your face a more square or heavy appearance.

By artfully reducing the activity of the masseter, Dr. Onir creates a slimmer, softer, more balanced lower face. It’s not about change, it’s about refinement. And bonus: many patients find their jaw tension or TMJ discomfort improves too.

Why the Surge in Popularity?

You might be asking: Why is Jawtox trending? There are a few big reasons:

  • It aligns with the “slim-jaw,” “V-shape face,” and “jawline contouring” aesthetics that are dominating beauty conversations online and on platforms like TikTok and Instagram.
  • It offers both aesthetic and functional benefit — addressing jaw tension, clenching, and bruxism while gently reshaping.
  • It is minimally invasive, with little to no downtime, making it appealing for busy professionals and aesthetic-conscious patients alike.
  • Search interest for “Jawtox” has spiked significantly — making it a smart topic to feature when people are searching “masseter Botox Boston,” “jawline slimming injections,” or “Jawtox treatment near me.” Glimpse

At The Spiegel Center, we see patients from Boston, New England and beyond, many of whom say: “I saw this trend online, I wondered if it would work for me — now I’m ready.”

What Are the Benefits of Jawtox?

The beauty of Jawtox is that the result isn’t dramatic or over-done — it’s subtle, balanced, and totally you. Benefits include:

  • A slimmer, more tapered jawline and lower face
  • Softer facial contours with less of a heavy, square jaw look
  • Relief from clenched jaw, grinding, or TMJ‐related discomfort
  • No surgery, no downtime, and minimal recovery
  • A results timeline that unfolds naturally — many notice change in 2-3 weeks, optimal result around 4-6 weeks

In short: if you want your selfies to look more refined without obvious change, this is a strong option.

Why Choose The Spiegel Center & Dr. Onir 

At The Spiegel Center in Newton, MA, precision matters. Dr. Onir isn’t just an injector; she’s an artist with injectables. Her work is recognized globally, but she also cares deeply about local patients in Boston/New England who want elegant, natural results. With Jawtox, her goal is always the same: providing the best results and the highest quality experience in the world.

Every patient’s anatomy is unique, and every treatment is tailored. You’ll walk into our consultation knowing exactly what to expect — and walk out knowing you got the real deal.

What to Expect During Your Appointment


Your Jawtox session with Dr. Onir takes about 15-20 minutes. Here’s a breakdown:

  • Assessment: Dr. Onir will review your jawline, facial structure, and any history of grinding or TMJ issues.
  • Treatment: Small doses of Botox are applied to the masseter muscles with precision.
  • Recovery: There’s no downtime — you can head back to your day immediately.
  • Timeline: You’ll start seeing soft changes in 2-3 weeks, with full contouring visible by week 4-6. Results last around 4-6 months, and many patients maintain with periodic treatments.
  • Safety: Jawtox is safe when performed by a trained, experienced injector like Dr. Onir. Normal chewing function is preserved.

The Takeaway

If you’re looking to refine your lower face, soften your jawline, alleviate tension, or simply explore a trending aesthetic treatment, Masseter Botox (Jawtox) at The Spiegel Center may be your next move. It’s subtle, sophisticated, and increasingly sought-after in Boston and beyond.

Book Your Jawtox Consultation Today

Ready to explore a slimmer, more refined jawline with Jawtox? Schedule your consultation with Dr. Onir Spiegel at The Spiegel Center — where you’re the center of the process, and where exceptional results meet full-service experience.
👉 Call or text 617.566.3223 or book online to get started.


Meet Our Doctors

Dr. Jeffrey Spiegel


Dr. Jeffrey Spiegel

With special expertise in all aspects of facial plastic surgery, and a particular skill for revision surgery, it’s clear why Dr. Spiegel is one of the most celebrated facial plastic surgeons in the world. If you are seeking the best possible results, or have a uniquely challenging problem, you’ve found the right doctor.

Learn More About Dr. Jeffrey Spiegel

Dr. Onir L. Spiegel


Dr. Onir L. Spiegel

Dr. Onir (pronounced “oh-near”) has years of experience in facial aesthetics and treats some of the most recognizable and famous faces. Dr. Onir started her career in oral health, earning doctorate degrees from both New York University and Boston University. She has been the recipient of numerous awards for her cutting-edge medical research as well as her technical skills in dentistry.

Learn More About Dr. Onir L. Spiegel

Dr. Jacob Tower


Dr. Jacob Tower

A board-certified specialist in facial plastic surgery, Dr. Jacob Tower brings a thoughtful approach and an artistic eye to New England’s premier plastic surgery practice, The Spiegel Center in Newton, Massachusetts. In addition to being an in-demand surgeon, Dr. Tower is an assistant professor at the Boston University School of Medicine, a sought-after lecturer, and an expert in facial plastic surgery.

Learn More About Dr. Jacob Tower
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