Peritonsillar abscess is a collection of infected material in the area around the tonsils.
Peritonsillar abscess is a complication of tonsillitis. It is most often caused by a type of bacteria called group A beta-hemolytic streptococcus.
Peritonsillar abscess is usually a condition of older children, adolescents, and young adults. It has become uncommon with the use of antibiotics to treat tonsillitis.
One or both tonsils become infected. The infection usually spreads behind the tonsil and can then spread down into the neck and chest. Swollen tissues can block the airway. This is a life-threatening medical emergency.
The abscess can break open (rupture) into the throat. The content of the abscess can then travel into the lungs and cause pneumonia.
Symptoms of peritonsillar abscess include:
An examination of the throat often shows swelling on one side and on the roof of the mouth.
The uvula in the back of the throat may be shifted away from the swelling. The neck and throat may be red and swollen on one or both sides.
The following tests may be done:
If the infection is caught early, you will be given antibiotics. More likely, if an abscess has developed, it will need to be drained with a needle or by cutting it open. You will be given pain medicine before this is done.
Sometimes, at the same time the abscess is drained, the tonsils will be removed. In this case, you will be put to sleep with anesthesia.
Peritonsillar abscess usually goes away with treatment, although the infection may return in the future.
Call your health care provider right away if you have had tonsillitis and you develop symptoms of peritonsillar abscess.
Call your health care provider if you have:
Treating tonsillitis, especially bacterial tonsillitis, quickly and completely may help prevent an abscess.
Quinsy; Abscess - peritonsillar
Shirley WP, Woolley AL, Wiatrak BJ. Pharyngitis and adenotonsillar disease. In: Cummings CW, Flint PW, Haughey BH, et al, eds. Otolaryngology: Head & Neck Surgery. 5th ed. Philadelphia, PA: Elsevier Mosby;2010:chap 196.
Melio FR. Upper respiratory tract infections. In: Marx JA, Hockberger RS, Wallis RM, et al, eds. Rosen's Emergency Medicine: Concepts and Clinical Practice. 7th ed. Philadelphia, PA: Elsevier Mosby;2009:chap 73.
Updated by: Seth Schwartz, MD, MPH, Otolaryngologist, Virginia Mason Medical Center, Seattle, Washington. Also reviewed by A.D.A.M. Health Solutions, Ebix, Inc., Editorial Team: David Zieve, MD, MHA, David R. Eltz, Stephanie Slon, and Nissi Wang.
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