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The most common causes of chronic nasal congestion are allergic rhinitis, from environmental allergens or irritants, and chronic rhinosinusitis. Chronic rhinosinusitis is defined as a sinus infection of greater than 12 weeks' duration that includes 2 or more major sinus symptoms or at least 1 major and 2 minor symptoms. Major symptoms include:
Very few drugs relieve a symptom as speedily as an over-the-counter decongestant nasal spray clears a stuffy nose. A couple of squirts can shrink swollen tissues in seconds to minutes, letting in an exhilarating rush of fresh air. With some sprays, a single dose works for as long as 12 hours. But relief provided by nasal spray decongestants like Afrin and Neo-Synephrine comes at a price: the risk of rebound congestion caused by overuse and, for some people, a vicious cycle of overuse and dependence that feels like an addiction.