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What causes sinusitis?

ANSWER

Sinusitis is usually caused by a virus or bacterial infection. Even fungus can cause it.

From: How Do I Know If I Have Sinusitis? WebMD Medical Reference

SOURCES:

American College of Allergy, Asthma, and Immunology: “Sinus Information.”

NPR: “Diagnosing a Sinus Problem Can Be a DIY Project.”

Mayo Clinic: “Chronic Sinusitis: Symptoms and Causes” and “Chronic Sinusitis: Diagnosis.”

Reviewed by Melinda Ratini on February 28, 2018

SOURCES:

American College of Allergy, Asthma, and Immunology: “Sinus Information.”

NPR: “Diagnosing a Sinus Problem Can Be a DIY Project.”

Mayo Clinic: “Chronic Sinusitis: Symptoms and Causes” and “Chronic Sinusitis: Diagnosis.”

Reviewed by Melinda Ratini on February 28, 2018

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When should I call my doctor about sinusitis?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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