What can I do with my uneven upper lip? The asymmetry is very pronounced when I smile. (Photos)

zlclr. Excellent photographs. Overall,  you have a very pretty smile and correction of the mild asymmetry can be accomplished with fillers like Juvéderm Ultra plus. However correction must be conservative, because overcorrection can create greater asymmetry. Be certain to consult with a board-certified plastic surgeon. Best of luck.

Lip augmentations with fillers is a great option to improve the fullness, suppleness and symmetry of the lips. Results can be very natural-looking and will feel very natural. I prefer to use a micro cannula to inject the lips to prevent bruising. Look for a cosmetic dermatologist or plastic surgeon who is an expert in fillers. 
I hope this helps.