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Tonsillitis

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Tonsillitis

Tonsillitis is an infection or inflammation of the tonsils. The tonsils are areas of tissue on either side of your throat, above and behind your tongue. They are part of your immune system, which helps you fight infection.

Current as of: May 1, 2026

Author: WebMD Ignite Staff

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This information does not replace the advice of a doctor. WebMD Ignite, disclaims any warranty or liability for your use of this information. Your use of this information means that you agree to the Terms of Use. Learn how we develop our content.

NOTICE: This health information was not created by Columbia University Irving Medical Center and may not necessarily reflect specific CUIMC practices. For medical advice to your personal condition, please consult your doctor. Medical advice disclaimer.