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Square Jaw Botox: My jaw muscles feel rock-hard when I clench my teeth

Square Jaw Botox

Worried about a square jaw? Let’s check!
If you feel like your face looks too square, try this quick test—clench your teeth and touch both sides of your jaw. Can you feel those firm muscles? That’s your masseter muscle at work!
Masseter Botox is a simple treatment that slims your jawline by relaxing the masseter muscles. It’s one of the easiest ways to achieve a more contoured look without surgery!
The best part? It’s quick, low on swelling or pain, and can even be done during a lunch break if your clinic is nearby!
Masseter Muscle: The muscle on both sides of your jaw that contracts when you clench your teeth.

Square Jaw Botox (Masseter Botox) Before & After

<Before> <After: 5 days later> <After: 2 weeks later> *The information on this page is for reference purposes only, based on generally accepted knowledge. It is not intended to serve as a medical judgment or diagnosis. Since details may vary depending on the medical institution, patient, or other factors, please consult a qualified medical professional before making any decisions regarding surgery or procedures.

Let’s keep it simple: What it is

"Masseter Botox relaxes the jaw muscles, helping to slim and contour the face for a more refined look."

Must know info!

Pros
Achieve a slimmer, more contoured face!
Cons
May cause hollow or sagging cheeks
Duration
Lasts around 6 months
Best For
People with strong jaw muscles (masseter hypertrophy)
Price (On UNNI App)
$15 ~ $200 (Based on 50 units, as of Mar 2025, VAT included).

How painful is it?

Does It Hurt? Pain Level: 3/10

Masseter Botox is typically done with a cooling spray for localized numbing, but the type of anesthesia may vary depending on the situation.
The pain? Just a quick pinch as the needle enters the skin! Since the injection goes directly into the jaw muscles, you might feel slight discomfort, but it's totally manageable.
"Hold up! This pain scale is based on reviews from Gangnam Unni staff who have actually had the procedure themselves!
Pain levels can vary depending on the person, clinic, and even how you're feeling that day—so take this as just a rough guide! "

Here’s all you need to know

Is Masseter Botox Right for You?

Since Botox works on muscles, Masseter Botox is best for people with strong, well-developed jaw muscles (a.k.a. masseter muscles).
Not sure if you have them?
Try this: Clench your teeth and feel your jawline.
If you can clearly feel or see the muscle pop out, you’re a great candidate!
If nothing really moves, your square jaw might be due to bone structure rather than muscle. In that case, Botox may not be as effective, so it’s best to consult a doctor for other options!

What You Need to Know Before Getting Masseter Botox!

Plan ahead—get it at least a month before a big event!
Got a wedding, job interview, or special occasion coming up? Get Botox at least 4 weeks in advance for the best results!
Botox gradually relaxes the jaw muscles, so the slimming effect kicks in after about a month.
Consistency is key!
Masseter Botox isn’t permanent—it wears off as your muscles regain movement.
To maintain a slimmer jawline, here’s the ideal treatment schedule:
First 3 sessions: every 3–4 months
After that: every 5–6 months for maintenance
Pro Tip: Everyone’s body reacts differently, so talk to your doctor about the best timing for you!

Possible Side Effects—What to Watch For!

Can you develop Botox resistance?
Yes, but only if the Botox contains complex proteins.
Some Botox brands include extra proteins, which can cause your body to build antibodies—making the treatment less effective over time
Want to lower the risk?
Ask for a "pure toxin" Botox formula (one without unnecessary proteins) to reduce the chances of resistance!
Will it make my cheeks look hollow?
Maybe—but only if too much muscle volume is lost.
For some people, shrinking the masseter muscles too much can make their cheeks look slightly sunken.
If you already have high cheekbones or slight hollowness, mention it to your doctor so they can adjust the dosage for a more balanced look!
Can it mess up my smile?
If Botox is injected unevenly or too much is used on one side, it can cause temporary smile asymmetry—meaning one side of your mouth may lift higher than the other.
What to do?
No worries! If this happens, it’s temporary and fades as the Botox wears off. But if something doesn’t feel right, visit your clinic for a quick check-up.

Have you made up your mind?

Hope This Guide Helps You!
It’s your face, so take your time—no rush!

You can find everything you need on UNNI!

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*The information provided on this page is for reference purposes only and is based on commonly available data. It does not constitute medical advice, diagnosis, or treatment. The details may vary depending on individual circumstances, healthcare providers, and medical institutions. Before making any decisions regarding surgery or procedures, please consult with a qualified medical professional.
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