My Left Nostril Has Sunk in (And Has Scarring on the Inside) After Rhinoplasty. What Would Be the Best Way to Fix This? (photo)

I think the best thing to do is wait the five more months to complete a year. The only definitive treatment is to place an alar batten graft to add support to the ala. I wold not use any fillers there, as they do not work.

The depression of your left ala due to a previous rhinoplasty will need to be revised with a cartilage graft placed in order to correct this. Fillers will not work. See a very experienced rhinoplasty surgeon for best results.

The photo appears to show evidence of Supra-alar pinching, most likely related to the amount of cartilage removed from the lateral portion of the alar cartilage.  When excess cartilage is removed, the skin-soft tissue envelope "shrinks wraps" over the remaining cartilaginous structure.  When there is a deficiency of cartilage, a "pinched" look ensues.  As noted by Dr. Bustillo, cartilage grafting is usually necessary to correct this problem and one year is generally the best time to consider revision.  Fillers are contraindicated for this problem.