Can I Slim a Square Face with Botox? (photo)

You have masseter hypertrophy, which is causing a bulkiness to your lower face, and you are an excellent candidate for neurotoxin to reduce masseter hypertrophy.  You will notice the slimming effect on the lower face within several weeks.  If you like the effect, you will want to repeat your injections periodically.

A way to estimate whether or not you should expect any improvement with masseter reduction using Botox is to stand in front of a mirror.  Look at the angles of your jaw and compare the clenched versus unclenched contour.  Then put each of your hands on each side of your jaw.  Again, feel your jaw when it's clenched versus unclenched.  The muscle at the angles of your jaw you are seeing and feeling is the masseter muscle.  The Botox will reduce the bulk in that area from the muscle, but if your jawbone is still extremely wide despite pressing down on the muscle then you will experience only minimal improvement.  

Based on the photo's you've provided, you look like a great candidate for masseter reduction with Botox. Visiting with a well-trained and reputable provider will help you determine how many units would be needed to achieve an aesthetically pleasing look - and also educate you on a long-term plan.