Gros jaw muscles

[Norwegian09]

one side of my face is more developed and more defined. It looks like my jaw muscle on my right side is a lot worse and I have a worse jawline on that same side that lacks muscle. How can I fix this.

 

[rayane.thnjt]

chew more ont the weaker side like if u chew 20 times ches 10 times in the part that lacks muscles then the other 10 gets chewed evenly and always DNR

 

[Norwegian09]

Should I buy mastic gum. I have also heard going to the gym gets you a better jaw. Is that true?