Nasal Congestion and Sinusitis Many causes of chronic nasal congestion, postnasal drip, and sinusitis can be treated with in office procedures that may provide long-term relief. To learn more about our nasal congestion and sinusitis treatment, click on the links below: Balloon Sinuplasty VivAer® And RhinAer® Allergic Rhinitis ClariFix® Cryotherapy