Tonsillitis

Definition/Description

Systemic illness with marked dysphagia, pyrexia & lethargy - duration 5 –7 days. With swollen tonsils and often tonsillar exudate.

A similar, common and often parallel condition is acute pharyngitis in which lymphoid tissue of the posterior oropharyngeal wall may become inflamed

Red Flag Symptoms

  • Unilateral enlargement with no signs of infection.
  • Tonsillar cancer (mostly related to tobacco use but large growth seen in HPV related cancers)
  • Unilateral signs
  • Signs of obstruction

Guidelines on Management

Management

  • Encourage smoking cessation
  • Encourage weight loss (if appropriate)
  • This is usually a self-limiting disease. 50% are thought to be viral and of course glandular fever is viral. Usually simple OTC the counter remedies are all that is required for pain relief.
  • In the UK throat swabs are not usual practice.
  • You can use the CENTOR criteria to make a judgement on whether to use antibiotics. You can also consider a delayed prescription. CENTOR was developed for pharyngitis.

The CENTOR criteria are:

One point added for each positive criterion: [1]

  • History of fever
  • Tonsillar exudates
  • Tender anterior cervical adenopathy
  • Absence of cough

The Modified CENTOR Criteria add the patient's age to the criteria: [2]

  • Age <15 add 1 point
  • Age >44 subtract 1 point

Guidelines for management state: [1]

  • 0 or 1 points - No antibiotic or throat culture necessary (Risk of strep. infection <10%)
  • 2 or 3 points – consider treating with an antibiotic (see below) - perhaps delayed. (Risk of strep. infection 32% if 3 criteria, 15% if 2)
  • 4 or 5 points - Treat empirically with an antibiotic (Risk of strep. infection 56%)
  • Consider a prolonged antibiotic treatment for 10 days. Please refer to North Yorkshire Antibiotic Guidance – acute sore throat.
  • First line: Phenoxymethylpenicillin 500mg QDS for 10 days
  • Alternative (penicillin allergy): Clarithromycin 250 – 500mg BD for 5 days

Referral Criteria/Information

If considering referral for a tonsillectomy please note this procedure is not routinely commissioned. Please see the Tonsillectomy Commissioning Statement for full referral criteria.
 

Indications for referral

  • 2WR: Sinister red flag features with no signs of infection - to rule out malignancy - 2WR
  • Acute: Peri-tonsillar abscess (Quinsy) - Key features are; swelling adjacent to tonsil (usually unilateral), change to voice (hot potato voice), Trismus (limitation to mouth opening).
  • Usually needs draining - admit same day.
  • Tonsillar enlargement causing acute upper airways obstruction - admit.
     
  • Recurrent: Recurrent sore throat where the following documented evidence applies:
    • 7 or more episodes of tonsillitis* in the last year OR
    • 5 episodes per year in the preceding two years OR
    • 3 episodes per year in the preceding three years AND there has been significant severe impact on quality of life indicated by documented evidence of absence from school/work; AND/OR failure to thrive

A frank discussion of the risk and benefits of the operation should be had. It is painful. People can continue with recurrent pharyngitis after a tonsillectomy. There is a 2% risk of post-op bleed that may need to go back to theatre and can be life threatening.
 

Information to include in referral letter

For recurrent tonsillitis

  • Timing, number each year in the last few years of proven tonsillitis, effect on quality of life.
  • Please comment on the discussion of risks and benefits you have had with the patient.
  • Relevant past medical/surgical history.
  • Current regular medication.
  • BMI/Smoking status/Alcohol status/Employment 
  • MUST include a completed tonsillectomy referral form 

Places covered by

  • vale-of-york

Hospital Trusts

  • york-and-scarborough-teaching-hospitals
Author: Responsible GP: Dr Daniel Kimberling / Responsible Consultant: Mr Frank Agada / Responsible Pharmacist: Laura Angus
Date created: 12/08/2025, 10:18
Last modified: 12/08/2025, 10:24
Date of review: 30.09.24