Medinfo - Easy to understand information on hayfever, a common condition caused by an allergy to pollen. Information on symptoms, treatment and prevention. HON Allergy Glossary - Rhinitis - Information about allergic rhinitis from HON, a Swiss non-profit foundation. Rhinitis - Information about rhinitis from the Center for Chronic Nasal and Sinus Dysfunction. Rhinitis - Details of allergic and non-allergic rhinitis from AAAI Patient/Public Resource Center. Medicine Net.com: Chronic Rhinitis - Resource applicable to both patients and physicians covering chronic rhinitis and related conditions, with related links. WebMD Inc. - Questions and Answers on causes, symptoms and treatment for hay fever or allergic rhinitis. University of Oregon Health Center - Information about allergic rhinitis including the causes and different treatment options. National Jewish Medical and Research Center: Bronchiectasis - Factsheet on this condition of the airways in the lungs including the causes, symptoms, diagnosis, associated conditions and treatment. NHS Choices: Allergic Rhinitis - Factsheet including causes, symptoms, diagnosis and treatment, with links to other useful resources. NHS Choices: Non-Allergic Rhinitis - Factsheet including the different types of this condition, the causes, symptoms, diagnosis and treatment. eMedicine: Allergic Rhinitis (Hayfever) - Dr. Javed Sheikh reports on pathophysiology of seasonal and perennial allergic rhinitis or hayfever. Review common allergy symptoms, allergens, trigger factors, and drug treatments. eMedicine Health - Hay Fever - Consumer health resource center providing information on the causes, symptoms, and treatment.