Tonsillitis is an infection or inflammation of the tonsils. The tonsils are balls 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: November 14, 2014

Author: Healthwise Staff

Medical Review: Adam Husney, MD - Family Medicine & Charles M. Myer, III, MD - Otolaryngology