Slimming a strong jaw with neuromodulators

Not all jaw concerns are about adding definition; some patients want to reduce a jaw that appears too wide or square, and for the common cause, an enlarged masseter muscle, neuromodulator injections offer a non-surgical solution.

The masseter is the chewing muscle at the angle of the jaw, and in some people it is enlarged, often from clenching or grinding (bruxism) or simply genetics, giving the lower face a wide, square look. Injecting a neuromodulator into the masseter relaxes and, over time, slims the muscle, softening the jaw contour for a slimmer lower face. As a bonus, it frequently relieves the jaw tension, clenching, and associated headaches that accompany an overactive masseter, making it a treatment with both cosmetic and functional benefits.

Results develop over weeks as the muscle reduces and last several months, requiring maintenance to sustain. It suits patients whose jaw width comes from muscle bulk rather than bone, a distinction a clinician confirms on exam, since a bony-wide jaw will not slim from muscle relaxation. For the right candidate, masseter treatment is a low-downtime way to refine the lower face and ease clenching at once. As with any injectable, an experienced provider who can assess whether muscle is truly the cause is key to a natural, effective result.

Related reading: Facial contouring trends to approach with caution and Fat transfer for facial volume and contour.