A wide musculature jaw is a masculine trait that is desirable in men. In woman it is a less desired look.
In female patients a wide jaw may be a sign of a condition in which you grind or clench your teeth. This may occur when you are awake subconsciously or during sleep. This can lead to pain, dental damage and also an enlargement of the chewing muscle known as the master which accounts for jaw width.
Addressing the underlying cause is important and having a dental assessment. BTA injections can used to soften the clenching effect of the muscle and also reduce its bulk and thus also contour the jawline to soften the female facial silhouette.