Do I have masseter hypertrophy? And if so would I benefit from botox? (photo)

Botox is an effective treatment for masseter hypertrophy. This can help narrow or soften a strong square looking jawline. It is best to clench your teeth whilst pressing over the masseter and jaw line. This will help give you an idea of how active your masseter is and an idea of thickness. 

Hello and thank you for your question.   The best advice you can receive is from an in-person
consultation.  You appear to be a good candidate for botox injection into the masseter.  I usually inject 20U per side. 
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

It appears that you do you have masseter hypertrophy, and any neuromodulator like Botox would benefit you greatly in reshaping your jawline.
You will just want to make sure that your physician has the appropriate training, comfort level, and has planned appropriately.
To ensure you are receiving the highest level of care, seek out a modernly trained, new-school dermatologic surgeon, oculoplastic surgeon, facial plastic surgeon or plastic surgeon who is board certified and fellowship trained in one of these "core four" cosmetic specialties.
Cameron Chesnut#realself500 Physician