What are the causes of bacterial infection of the nose and sinuses?

This type of infection often occurs after an upper respiratory infection, such as a cold. The bacteria then infect the membranes of the nasal cavity and sinuses. But you can also get it if you have any of the following:

•     Allergic rhinitis
•     Long-term nasal congestion and inflammation not caused by allergies
•     Obstruction (blockage) in the nose

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