You are in Medical Library . See also Retropharyngeal abscess . Causes, Incidence and Risk Factors Peritonsillar abscess is a form of cellulitis that is a complication of tonsillitis . Group A beta-hemolytic streptococcus is usually the cause of peritonsillar abscesses . Swollen tissues may obstruct the airway, which would be a life-threatening medical emergency.
Peritonsillar abscess is generally a disease of older children, adolescents, and young adults.
It has become relatively uncommon since the use of antibiotics to treat tonsillitis. Aspiration of the abscess usually shows fluid containing pus. Culture of the fluid may show bacteria. Treatment Treatment is aimed at curing the infection and relief of symptoms. Antibiotics may be given if the infection is bacterial.