Do you have jaw pain every morning when you wake up? Does it get so bad that sometimes you get headaches and you have trouble chewing food? This is because you have a very strong and tight masseter muscle. By injecting botox into the masseter muscle (jaw muscle), this can relax the jaw, relieving jaw pain for up to 4 months! Additionally, because this jaw muscle is relaxed, this can transform a round face or square-shaped jaw into a slimmer appearance!