For masseter hypertrophy, Botox can slim the jawline by reducing muscle bulk

https://canvas.instructure.com/eportfolios/3796094/home/jaw-tension-relief-with-botox-from-clenching-to-calm

For masseter hypertrophy, Botox can slim the jawline by reducing muscle bulk, creating a softer contour and relieving clenching in some individuals.