Can masseter botox fix jaw asymmetry? (Photos)

Hello! I’m Lauren, the aesthetic injector here at Colorado Plastic Surgery Center. Yes, masseter Botox can help improve jaw asymmetry if it's caused by uneven muscle size. If one side of your masseter muscle is bulkier, targeted Botox can relax that side, slimming it down over time for a more balanced look. It may also help with jaw pain and clicking by reducing muscle tension.

Injecting Botox into the bulkier masseter will help in this situation. I recommend injecting approximately 20-25 units of Botox to correct this kind of jaw asymmetry.

Yes, Botox can help improve jaw asymmetry if the differences are due to hypertrophic muscles. Other possible reasons such as skeletal differences would not be impacted by Botox. See an expert injector near you for an evaluation and to learn more.

Masseter Botox can sometimes improve jawline balance, but with important caveats:
Jaw asymmetry has many causes. Sometimes it’s due to the masseter muscle being larger or more active on one side, but it can also come from differences in bone structure or bite alignment.
Botox only works on muscle. If your asymmetry is primarily muscular (one side of the masseter is bulkier, often from clenching or grinding), then carefully placed Botox on the stronger side can slim it down and create more facial symmetry.
It won’t correct bone differences. If your asymmetry comes mainly from the jawbone itself or from your bite, Botox won’t fix that. It can still improve balance in combination with other treatments.
Many patients also notice reduced jaw pain and clenching after Botox treatments in the masseters, which can be a nice functional benefit.
Next steps:A consultation with an injection expert that understands facial asymmetry is important. They’ll examine whether your difference is muscle-dominant or bone-dominant. Then determine if you’d benefit from Botox alone, or in combination with orthodontics, fillers, or other options.

If one side of your jaw looks larger because the masseter muscle is bigger or more active on that side, Botox can relax it and create a slimmer, more balanced appearance over time (usually 2–3 months for full results).
However, if the asymmetry comes from bone structure rather than muscle, Botox alone won’t correct it. A consultation with an injector experienced in facial balancing is the best way to tell what’s causing the asymmetry—and whether Botox, filler, or other treatments might help.