Square or Full Jawline

Square or Full Jawline:– We often have patients who come in complaining that they are noticing heaviness to their lower face as they get older. Part of what they are seeing is skin laxity and descent of facial fat causing a “jowly” appearance. Another part of this heaviness effect, however, is an enlargement and squaring of the angle of the jaw. This is the main muscle responsible for chewing. Either through genetic predisposition to enlargement or continuous exercise via teeth grinding and clenching, or both, the muscle gets bigger. As the masseter muscle enlarges and the jawline becomes more square and pronounced, a woman’s face becomes more masculine in appearance.


Throughout the world, Botox injections are a safe and effective way to reduce masseter muscles. Because Botox partially weakens it, the muscle becomes smaller with time. The other effect is that a weaker muscle is not able to grind like it used to, so any nighttime grinding habit is quickly broken.

We have seen that many patients stop grinding after two or three sessions of Botox injections into the masseter muscles. The procedure is quick, relatively painless, and requires no anesthesia or downtime. The jaw reduction treatment does not result in weakness of the bite or chewing. The effects can be relatively quick however it may take up to six months before the visible shrinking of the muscle can be observed.

Botox injections should be repeated every 4 months for up to a year to obtain optimal results. Jawline reduction is often maintained even if no further Botox injections are done after the first year of treatment.