I had rhinoplasty 25 years ago and was wondering about the long term effects

Over many years and no skin change after rhinoplasty and sometimes the nasal passages can become narrow.  He need to be examined by an otolaryngologist for evaluating the status of his nasal septum, nasal valve and turbinates.RegardsDr. J

Depending upon how it was done, it may have contributed to airway collapse. Best to be evaluated in person.

You need an examination to diagnose the cause of your nasal obstruction and sinus problems. There are many possible causes of your problems; any recommendations or comments would be pure speculation.