![]() ![]() IU Health Ear, Nose and Throat physicians can diagnose and provide surgical treatment of structural abnormalities that may cause postnasal drip. If your allergy testing shows that you do not have allergies, there may be another cause for your postnasal drip. For example, by keeping your windows shut and installing high quality air filters, you can greatly reduce the number of allergens in your home. Learning about products and strategies you can use to reduce your exposure to these allergens will help. Postnasal drip is most commonly caused by airborne allergens, which can be difficult to avoid.
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