Fix uneven lips? How to make side symmetrical? (photo)

Thank you for sharing your question and photograph.  A small amount of hyaluronic acid filler such as Volbella or Vollure may be able to improve upon your very subtle asymmetry.  It appears that you have a small difference in the amount of "red show" of the lip.  Hope this helps.

Yes. Dermal fillers do a nice job of fixing mild asymmetry such as yours. There are quite a few new ones on the market (Vollure, Volvella) that deliver really lovely, natural looking results.