Peritonsillar abscess

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Accumulation of pus in the back of the mouth and around the tonsils, caused by a bacterial infection.

The origin of the infection is usually a complicated tonsillitis. 

It manifests with fever, chills, severe sore throat (usually on one side), difficulty opening the mouth, swelling of the face, headache, drooling or inability to swallow saliva, muffled voice, and enlarged and tender lymph nodes in the jaw and throat. 

Diagnosis is based on clinical history and oropharyngeal examination. The diagnosis is completed with blood tests and imaging tests such as computed tomography. 

Treatment is based on intravenous antibiotics and pain control with standard analgesics. More severe cases require surgical drainage of the pus, including removal of the tonsils.

Bibliographic references
  1. Ellen R Wald. Peritonsillar cellulitis and abscess. UpToDate. Mar 08, 2016..
  2. Goldstein, NA, Hammerschlag, MR.. Peritonsillar, retropharyngeal, and parapharyngeal abscesses. In: Textbook of Pediatric Infection Diseases, 6th, Feigin, RD, Cherry, JD, Demmler-Harrison, GJ, Kaplan, SL (Eds), Saunders, Philadelphia 2009. p.177
  3. Galioto NJ. Peritonsillar abscess. Am Fam Physician 2008; 77:199.
  4. Herzon FS, Martin AD. Medical and surgical treatment of peritonsillar, retropharyngeal, and parapharyngeal abscesses. Curr Infect Dis Rep 2006; 8:196.
  5. Keir, J, Almeyda, R, Bowyer, DJ, et al. Alternative strategies for drainage of peritonsillar abscess (Protocol). Cochrane Database Syst Rev 2006; :CD006287.
  6. Michael A. Rubin, Larry C. Ford, Ralph Gonzales. Faringitis, otalgia y síntomas de la porción superior de las vías respiratorias. Harrison. Principios de Medicina Interna. Volumen 1. 19º Edición. 225:234
Author
Dr. Oscar Garcia-Esquirol
Copyright
© TeckelMedical 2026

Symptoms

    Red or swollen tonsils


    Inside of the mouth is swollen


    "Hot potato" voice


    Swollen neck


    Substantial salivation

Symptoms to watch out for

Fever that doesn't subside with antipyretics (paracetamol, ibuprofen)
Difficulty breathing
Difficulty swallowing

Self-care

Relative rest, rest until symptoms subside.
Consume over-the-counter pain relievers or anti-inflammatories.
Check with your general practitioner about the prescription for antibiotics.