Having a broad face can be due to 3 factors: bone, fats and large chewing muscles. All these factors will inevitably play a part but the choice of treatment can depend on the invasiveness of the procedure and which factor plays a bigger part in causing the broad face. By reducing the activity of the chewing muscles with Botox, one can sharpen the angle at the back of the face.
Read more about Botox Jaw Slimming.