Is this normal for masseter Botox? Jaw seems bigger (Photo)

You need an in-person examination, but I don't think that's your bone. It's likely part of the masseter muscle which requires more Botox. I would recommend following up with your injecting physician. Best wishes.

it looks like your masseter is bulging outward. You need a small amount of botox injected to the remnant muscle that is still active when you bite. It may correct itself, but if it continues more than a couple of weeks, I would have the injector reevaluate for possible small number of additional units injected into the muscle.

It would be best to consult with the doctor who did the injection to make sure your injection is having the desired effect, and an asymmetry in muscle strength is not causing your problem.