Menu Healthy Lifestyle Diseases & Conditions First Aid Symptoms Tests & Procedures Videos Definitions FAQs Allergic sinusitisUpdated: 2020-05-23OverviewAllergic sinusitis is caused by an allergic response to outdoor or indoor allergens, such as pollen, dust mites or pet dander.SymptomsSymptoms include itchy, watery eyes, sneezing, nasal congestion and itching, and runny nose, which may be seasonal or year-round. TreatmentsSteroid nasal sprays, antihistamine drugs and allergy shots may help. © 1998-2022 Mayo Foundation for Medical Education and Research(MFMER). All rights reserved. Terms of Use