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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:
Constant swallowing is among the primary post-nasal drip symptoms. Swallowing occurs so often with a post-nasal drip because the back of your nose and throat will need lubrication. The excess mucus in the nasal drip can dry out the throat. This also tends to cause a feeling of fullness in the stomach and bad breath. Rhinorrhea is very common for people who have a nasal drip.