healthline.com http://www.healthline.com/health/allergic-rhinitis#Causes2 healthline.com Allergic rhinitis cause a condition called allergic rhinitis Allergic rhinitis http://www.healthline.com/health/allergic-rhinitis#1 external factors http://www.healthline.com/health/allergic-rhinitis#Causes2 following factors Allergic rhinitis http://www.healthline.com/health/allergic-rhinitis