How Long Does It Take for Masseter Botox to Work? Timeline for Results
How Long Does It Take for Masseter Botox to Work? Timeline for Results
If you're considering masseter Botox for facial slimming or TMJ relief, one of the most common questions is: How long does it take to work? Unlike forehead Botox, which can show effects in just a few days, masseter Botox follows a slower timeline—but it’s worth the wait.
On average, masseter Botox takes 2 to 4 weeks to start working, with full results visible in about 6 weeks. That’s because the goal isn’t just muscle relaxation—it’s muscle atrophy, which takes time to develop.
Let’s walk through the typical timeline and what you can expect during each stage.
When Do Masseter Botox Results Start?
Week 1: Minimal Change
In the first few days after the Botox injection, you may feel slight soreness or tenderness in the jaw, especially if you chew gum regularly. But visually, you won’t notice much yet. This is completely normal.
If you’ve had other treatments likelip fillers or forehead Botox before, the onset of masseter results may feel surprisingly slow—but the effects are just as powerful once they kick in.
Weeks 2–3: Muscle Softening Begins
By the second week, most patients start noticing a subtle reduction in jaw tension. For TMJ sufferers, this may be the first sign of relief. Chewing may feel easier, and clenching may decrease.
Visually, you may see slight softening in the lower face—but dramatic slimming hasn’t happened yet.
Week 4–6: Visible Slimming and Definition
By weeks four to six, you’ll see the full effects of the treatment:
Softer jawline
Slimmer lower face
Improved facial symmetry
Significant reduction in jaw clenching or pain
This is the sweet spot—your masseter muscle has relaxed enough to begin shrinking, giving you a more contoured look.
Patients who receive masseter Botox for both medical and cosmetic reasons often say this stage feels like “everything clicks”—a noticeable improvement in both how they look and how they feel.
Does It Take Longer the First Time?
Yes, your first treatment may take slightly longer to show results, especially if your masseter muscle is strong or overdeveloped. Repeated treatments can make the muscle shrink faster over time, and some people find their results appear sooner by the second or third session.
For more info on what to expect from Botox, this guide talks about various age related uses of Botox.
How Long Do the Results Last?
Masseter Botox results typically last 4 to 6 months, though this can vary by individual. To maintain long term results like, most patients schedule treatments 2–3 times per year, similar to Juvederm or other fillers.
What If You Don’t See Results?
If it’s been over 6 weeks and you haven’t seen any change, it’s possible that:
The dosage was too low
The injection placement wasn’t ideal
You have stronger-than-average facial muscles
You metabolize Botox faster than average
In these cases, a follow-up appointment can help assess whether a touch-up or dosage adjustment is needed.
Final Thoughts: Patience Brings the Best Results
Masseter Botox is a powerful tool for both aesthetics and wellness—but it’s not an overnight fix. You’ll need to wait 4 to 6 weeks to see the full slimming effect. When used correctly and paired with expert technique, the results are natural, balanced, and worth the short wait.
Book a Consultation and Get Your Timeline
If you're considering masseter Botox for facial contouring or TMJ relief, the best way to set realistic expectations is by talking with a provider who understands your anatomy and your goals.
Schedule your consultation today with Stratus Plastic Surgery. We’ll walk you through the timeline, discuss your treatment plan, and help you get the look—and comfort—you’re aiming for.