What Is Square Jaw Botox?
Square Jaw Botox injects botulinum toxin into the masseter, the muscle at the side of the jaw used for chewing, to gradually reduce the volume of an overdeveloped muscle and create a slimmer facial line. Without any jaw-shaving surgery, it softens a wide-looking lower face using injections alone. The procedure takes about 10–15 minutes, and you can return to your daily routine the same day.
How It Works
Botulinum toxin blocks the release of acetylcholine, the neurotransmitter that triggers muscle contraction. When injected into the masseter, the muscle can no longer contract strongly, and with reduced use it gradually atrophies and shrinks over time. As a result, a square, wide lower jaw narrows and the facial line becomes smoother. Our medical team assesses how developed the masseter is, along with any left–right asymmetry and skin elasticity, to design a natural line without excessive sagging.
Key Benefits
- A slimmer facial line as the overdeveloped masseter shrinks in volume
- A smoother, softer lower-jaw width that no longer looks square
- Helps improve asymmetry caused by uneven jaw-muscle size
- Helps relieve muscle tension from teeth grinding and clenching
- Lower-jaw slimming through injections alone, with no bone surgery
Recommended For
- Those with a square, wide lower jaw who want a slimmer facial line
- Those whose jaw muscles noticeably protrude when smiling or chewing
- Those whose masseter has developed from grinding or clenching habits
- Those who want to refine their line with a short procedure, not bone surgery
- Those bothered by asymmetry from differently sized jaw muscles on each side
Square Jaw Botox at Seye Clinic
At Seye Clinic, we keep a range of botulinum toxin products on hand, from domestic CoreTox to German Xeomin and US Allergan, and adjust the dose and injection points to your masseter development and the line you want. The treatment is performed with icing rather than numbing cream, and afterward our medical team walks you through aftercare and the timing of your next session to help results last.