Rhinitis may be allergic or non-allergic. Allergic Rhinitis is caused by allergens in the air, which are usually harmless but can cause problems in allergic people. Symptoms of Allergic Rhinitis often are a runny nose, sneezing, nasal congestion and itchy eyes, nose, throat and ears. Allergic Rhinitis puts you at risk for developing Sinusitis* because allergies can cause swelling of the sinuses and nasal mucous linings. People with Non-Allergic Rhinitis usually just have a stuffy nose. It may be caused by irritants such as smoke, changes in barometric pressure or temperature or overuse of over-the-counter decongestant nasal sprays.