Recently Had Botox for Jaw Slimming - One Side of Face is Now Tighter

By "tighter" do you mean that your facial expressions are restricted on one side more than the other? Most patients don't experience tightness when treated for jaw slimming.

 

If the Botox has been injected too high then there is a chance of having a tight feeling when you try to smile/move. 

One of your chewing (masseter) muscles might have been larger than the other before treatment with Botox and compensation now can be done to equalize the muscle mass.  There is a possibility that one side is compensating by trying to clench harder since the other has started to show its relaxation.  Depending on when the Botox was injected, you may feel a relaxation on the side that bothers you in a few days. If however it has been more than three weeks since your Botox, you should see your doctor to have an evaluation and possibly more Botox.

Hi IE.  It's difficult to say exactly what's going on without asssessing you, but there are a couple possibilities.  One is that the "tightness" is just the ability to more effectively clench the jaw on that side.  This may mean that not enough Botox was injected or that this side may need additional units to relax the muscles to the same extent as on the other side.

The other issue is that we often hear patients describe a "tightness" or heaviness  in the forehead area after Botox is injected.  We hear this from new patients quite frequently.  Perhaps you are having this same feeling with your jaw although it would seem unusual to have the tightness on only one side. 

A quick call or visit with your practitioner may help you answer your question.