Hello and thank you for your question. A formal evaluation would be needed to determine the best treatment. You would actually get a nice improvement with lip fillers, since your lips seem deficient relative to your nose and chin in these pictures- they should all be in a straight line when viewed from the side (profile view). Volbella, Restylane, and Juvederm are good to create a symmetrical lip. NovaThreads can be used to improve lift and shape. Implants or fat are alternatives. Technique will be important here, so you'll want to see someone meticulous. I suggest getting a consultation with an experienced cosmetic dermatologist and facial sculpting expert, or an aesthetic facial plastic surgeon like Dr. Donald Groves; we are both located right here in Los Angeles. Best, Dr. Emer