27-year-old female who presented complaining that her face had become more square. We diagnosed the issue as masseter (chewing muscle) enlargement, which was confirmed when she reported pain and tooth damage from grinding and clenching her teeth. She is shown 4 weeks after neurotoxin (Botox) treatment to these muscles, resulting in jawline slimming and a more heart-shaped face. She also has complete relief from her symptoms related to teeth grinding and clenching.