Lip injection with filler
Great question. You have full lips to begin with so I think you are correct in not wanting more filler in the body of the lips. I do, however, think your lower lip is smaller then your upper lip and could use a little bit of volume. I also notice an asymmetry in the upper lip which could be corrected with filler. Yes, filler can be injected along the border of the lips (vermillion border). I usually prefer Juvederm Ultra for injection into the lip body and something like Belotero or Restylane Silk for the lip border. I recommend you see an experienced injector for a detailed in person assessment.