The top lip is thin, the right side is thinner and slanted compared to the left
black415. Your asymmetry is minimal, so correction must be done with great care because your lips are quite attractive. 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!
Hi and thank you for sharing your question and picture. You do have beautiful lips and any unevenness can be best corrected with some hyaluronic acid-based fillers such as Voluma. Please make sure to work with a experienced physician. I hope it helps and good luck!