Thank you for your question. I believe you will benefit nicely with hyaluronic acid fillers like Juvederm and Restylane to help improve the symmetry of your lips. Results typically last 6-12 months and the filler can be dissolved with hyaluronidase if you are unhappy with the results. I recommend having a consultation with an expert injector to determine the best treatment plan for you. Best of Luck!
An expert board certified aestehtic physician can even out any lip asymmetry with fillers such as Volbella®. As this is an advanced technique, please consult a board certified aesthetic dermatologist for a consultation.