See also Retropharyngeal abscess . Causes and Risks 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. Peritonsillar abscess Please read this Important notice . Please read it.