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What is sinusitis?

ANSWER

Sinusitis is an inflammation or swelling of the tissue lining the sinuses. Healthy sinuses are filled with air. But when they become blocked and filled with fluid, germs can grow and cause an infection.

From: What Is Sinusitis? WebMD Medical Reference

SOURCES:

National Institute of Allergy and Infectious Diseases.

Acclarent. 

Reviewed by Laura J. Martin on July 09, 2018

SOURCES:

National Institute of Allergy and Infectious Diseases.

Acclarent. 

Reviewed by Laura J. Martin on July 09, 2018

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What conditions can cause sinus blockage?

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