How long does this filler last in the nose ?
Silk is not the ideal nose filler because it lacks stiffness and it's not as long lasting as other fillers. It depends on your goals, but usually thicker fillers are used for the nose, such as Restylane Lyft or Radiesse.
I recommend getting a formal evaluation with a cosmetic dermatologist to go over your desired results. Facial fillers (voluma, restylane, juvederm) along with Botox can be used to improve the symmetry of the nose and lift the tip, restylane in the nose typically last about 1 year. However, it won't make the nose appear smaller. Surgery would be needed to improve nostrils or overall shape. See an expert. Best, Dr. Emer