Can xeomin have a reverse affect on people? I got it injected in my jaws and it's actually doing the exact opposite. (photo)

Hello, "Circa1984," thanks for sharing your experience. I just saw your question and would love to bear back from you what the outcome was of your treatment after it had time to take effect fully.  I think it is possible that as one portion of your very large masseter muscle was being affected and relaxing, other portions that either were not injected or not yet affected by what was injected were still active. I usually inject in at least two areas in each masseter muscle because I use very concentrated Xeomin, Botox or Dysport, but a physician who was using very dilute concentrations might inject a larger volume in only one place, in which case you might see an an even onset of effect, although potentially the same effect ultimately.

I would wait for 2 weeks for the neuromodulator to take full effect and see what your final result will be..

Since you just had the Xeomin for your jaw 4 days ago, you have most likely not seen the full effect from the treatment yet. I would recommend waiting 1-2 weeks to see how it looks and if you still feel it is worse, you should contact your injector to be evaluated. There would be no harm in using Botox again if that was necessary.