Is my masseter Botox working?

Thank you for your question. It sounds as though you are responding to Botox appropriately and still have the ability to use your left masseter muscle. Full paralysis of the muscle would not be ideal for chewing and cosmesis. If you feel there has been improvement in jaw slimming on the left still with use of the masseter then you probably had the correct amount of units.

I would wait a total of 6-8 weeks to see the full result of your masseter botox treatment. If at this time you are not satisfied with the results I would go back to your provider to address your concerns

You should still be able to clench your teeth after Botox, Dysport or Xeomin in the masseter muscles. The fact that you can’t clench as much is a good sign. You need the muscle to be relaxed, but still functional so you can chew. It generally takes a few weeks before you’ll notice jaw slimming after Botox. If, after 2 months, you don’t notice a change, please consult your board-certified dermatologist to get a higher dose.