Thank you for your question. This requires great skill and experience. A small amount of filler, like Juvederm Ultra, will need to be placed very carefully to balance out your lip during dynamic contraction while not affecting your lips at rest. Please seek out an expert Board Certified Dermatologist or Plastic Surgeon for this treatment. Regards, Dr. Matt Elias
Dynamic movement causes the issues. The problem is that in repose it is not that apparent. Placing filler in the lip may cause asymmetry in repose.
Your asymmetry is only apparent when you smile, so correction must be done with great care because your lips are quite attractive when in repose. I recommend correction with a filler like Juvederm Ultra plus by an experienced injector very conservatively because over correction will cause another asymmetry. If you like the result, then you can consider fat transfer for a longer lasting result. Seek out a board certified plastic surgeon or dermatologist with lots of experience treating lips. Good luck!
Asymmetry of Lip
For lip asymmetry you can have a small amount of filler injected to balance out the asymmetry. This is an expert advanced technique so please consult a board certified dermatologist with a great deal of experience with facial injections. Best, Dr. Green