Masseter jaw reduction Botox 1 week ago and absolutely no changes. My masseters are big and strong. (Photo)

Thanks for your question, botulinum toxin for master reduction takes numerous treatments to get the physical change you are looking for. You are right that at 14 days you will feel the maximal "paralysis" from toxin however it is likely that you will need several treatments before you get jawline slimming from master toxin treatment

In certain individuals, large masseter
muscles can contribute to the appearance of a square jaw. Botox injected into
the Masseter muscle can temporarily weaken parts of the Masseter to cause it to
shrink in size and make the jawline
appear slimmer. As with any muscle, it
takes a while for the muscle to start
shrinking after it has been paralyzed.
Botox usually begins to work ~ 3 days after injection, and it can take up to 2 weeks for the full effect of the Botox to
take place.  The final effect of the
Botox will depend on how large your masseter muscles are and how many units of
Botox were used. At 1 week after injection,
it is normal not to see a drastic change yet.
 In instances like this, I would recommend waiting another week,
and if you still do not notice an improvement in
your jawline then you should visit
your injector to see if you would benefit from more Botox.