You can't (easily) alter the jawline bone, but you can alter the surrounding muscles with physical exercise. https://www.healthline.com/health/fitness-exercise

You can't (easily) alter the jawline bone, but you can alter the surrounding muscles with physical exercise. https://www.healthline.com/health/fitness-exercise/jawline-exercises https://www.healthline.com/health/fitness-exercise/jawline-e... I've personally witnessed a change after six months of crossfit every day. Maybe it's that all the wrinkly faces you make when you exert yourself. ;-)