How Long Does a Masseter Injection With BOTOX Last?

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A masseter reduction, also known as jaw slimming, involves using BOTOX® injections to soften the appearance of your jawline and improve facial balance. At Body+Beauty Lab in Philadelphia, PA, you meet with an expert aesthetic specialist who personalizes your masseter BOTOX service to ensure you achieve the results you want. Results last for several months before you ever need retreatment.

Read about how BOTOX can improve the appearance of your jawline and how long it lasts here. If you’re ready to get started, book a masseter injection consultation online or over the phone now.

What is a masseter injection with BOTOX?

BOTOX is a neuromodulator injectable that triggers muscle relaxation. Once BOTOX is injected into targeted muscles, a roadblock between muscle and brain communication occurs.

Because your muscles won’t be able to receive messages to tense up, they quickly become more relaxed. This effect results in a softening of your jawline that looks entirely natural. BOTOX injections are even beneficial for improving the symmetry of your jawline and overall facial balance.

How long do BOTOX masseter injections last?

Gone are the days when the only solution for smoothing and softening your jawline was through an invasive surgical procedure. Even though the jaw-slimming results you experience from your service at Body+Beauty Lab aren’t permanent, they are very long-lasting.

Most Philadelphia, PA clients report that their BOTOX jowl reduction injections provide optimal benefits for anywhere from four to six months (sometimes longer). As a clinically proven injectable, BOTOX injections are perfectly safe to continue getting again and again.

Sticking to your scheduled BOTOX masseter treatment plan is important. Over time, the more BOTOX you get, the longer your injections last. This is because after your first BOTOX jaw injections, your muscles fully recover as the solution wears off.

However, after several BOTOX treatments over several years, your muscles recover to about 95% of function. The lingering muscle relaxation that occurs with BOTOX injections means that in the future, you won’t need as many treatments.

How long does it take to see results after a BOTOX masseter reduction?

BOTOX begins working right away. While you may experience minor soreness or swelling along your jawline for the rest of the day after your injections, you should start noticing results within a few days. It can take up to a week or two for optimal results to surface.

Should I get BOTOX or Dysport for jaw slimming?

Body+Beauty Lab offers both BOTOX and Dysport® masseter reduction services. Dysport is also a neuromodulator injectable that functions similarly to BOTOX. However, depending on your facial muscles and desired outcome, your dedicated medical injector may recommend one injectable over the other. Like BOTOX, Dysport can generally last for about four to six months.


With a team of aesthetic experts available at Body+Beauty Lab in Philadelphia, PA, you can feel confident about experiencing lasting results from your BOTOX masseter injection service. You can book an appointment through the website or over the phone for in-person or online consultations.

* All information subject to change. Images may contain models. Individual results are not guaranteed and may vary.