How can I tell if I have Masseter hypertrophy? (Photo)

That condition is best evaluated on the basis of in-person consultation. Based on the extent of muscle hypertrophy according amount of neurotoxin will be injected. Sometimes multiple treatment may be needed to find a right dose. Good luck.

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  The only accurate way to assess for masseteric hypertrophy is with physical examination by your surgeon.  If you do have hypertrophy, botox can be an effective treatment.   Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.   The most
important aspect is to find a surgeon you are comfortable with. I recommend
that you seek consultation with a qualified board-certified plastic surgeon who
can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.  FACS
Harvard-trained plastic surgeon

The real test is what the masseter muscle does at rest and with you clenching your teeth together.  But by just looking at the one picture with your jaw at rest, you appear to just have a very thin face with normal masseyer muscle size. The lack of much facial fat makes your masseter muscle over the jaw angle stand out.