How to fix my slanted mouth / lips? (photos)

Nearly all individuals have some degree of asymmetry of the face. Mild asymmetry can often be corrected with fillers but may require repeated treatments as most are temporary. Certain areas can be permanently corrected using your fat for micro-grafting.More significant asymmetries may be a result of both bony and soft tissue asymmetry and may require jaw surgery.From your pictures you can most likely have excellent results with filler or fat but I recommend seeking a Plastic Surgeon who can offer any of these procedures if needed.Best,Nima Naghshineh MD MSc

You would require a small amount of Juvederm and Voluma to improve the appearance and make you more symmetric.  Please consult a board certified dermatologist with expertise with this area.  Best, Dr. Green