1.5 years Post Op-Non-surgical Nostril revision? (photos)

Thank you for your photos. They are excellent in that they not only demonstrate the issue with your alar retraction you are concerned with but they also show some of the anatomical causes of your retraction.  You can certainly try a conservative approach with dermal fillers to correct your retraction but I do not feel that it will be of much benefit.  Your issue is due to scarring at the upper border of your lower lateral cartilages.  They are scarred upward due to previous over resection of the cartilage during one of your prior rhinoplasty surgeries.  In order for that retraction to be corrected, the scarring would need to be released and a cartilage graft would need to be placed to prevent recurrence.  Not an easy task in a 4th rhinoplasty surgery.  I don't suspect your nostrils will continue to elevate.  

Nostril lowering is one of many applications for permanent results for lowering nostril margins after rhinoplasty. An examination would be necessary to determine your candidacy. Thank you. Dr Joseph 

Hey CMB1901, thank you for your inquiry and photos. In the past, in the hands of a skilled injector using soft tissue fillers can help a bit, however, injecting that part of the nose, especially after multiple surgeries can sometimes compromise blood flow. so before you agree to the procedure please understand the risk, it is better to stage your injections and go very slow as opposed to a single one and done injection. Otherwise, the majority of surgeons would agree that a minor procedure using cartilage or composite grafts (sometimes done in the office) may be your best option. 
hope this helps 
This answer has been solicited without seeing this patient and cannot be held as true medical advice, but only opinion.The information provided should not be relied upon as a substitute for consultations with a qualified health professional.