Do I have over enlarged masseter muscles?

Thank you for sharing your question and photographs.  You do not appear to have a significant case of enlarged masseters, but an in-person examination would offer you the best diagnosis and advice.  Be sure to see an ASPS board certified plastic surgeon in consultation. 

Thank you for your question. It is difficult to give you advice from looking at your photographs. However, if you are grinding you teeth or clenching your jaw you may benefit from Botox to the masseter muscles. I recommend having a consultation with an expert injector to determine the best treatment plan for you. Best of Luck!