We use our jaw muscles to chew. If this muscle is trained a lot, for example when you grind your teeth, the muscle can grow considerably. As a result, the jaw will look bulkier and squarer. A V-shaped jawline can be created with the help of Botox. Once Botox is injected into the jaw muscle, it prevents the muscles from contracting. Over time, the mass will decrease and the muscle will shrink in size.
