Tonsillitis is an inflammation of the pharyngeal tubes, which are glands in the back of your throat. This infection is most common in children; nearly all children in the United States experience tonsillitis at least once.

There are different types of tonsillitis: acute (and recurrent), chronic tonsillitis, and peritonsillar abscess. Common causes of acute tonsillitis are the herpes simplex virus, Streptococcus pyogenes (GABHS), Epstein-Barr virus (EBV), cytomegalovirus, adenovirus, and the measles virus. Bacteria is a less common cause of tonsillitis (15-30%).

Tonsillitis is usually treated with antibiotics. When the infection is chronic or recurrent, a surgical procedure to remove the tonsils is recommended.