Clinical Guides
Tonsillitis
Guide to assessing acute tonsillitis, separating viral illness from group A streptococcal disease, using tests and antibiotics selectively, and recognising quinsy, airway compromise and sepsis in Indian care. It prioritises airway-first triage, hydration, analgesia, allergy safety, stewardship and return instructions over reflex treatment, while distinguishing recurrent symptoms from episodes. It is teaching, not a substitute for exam or emergency care, and supports clinical safety netting.
MedNext Academy | 12 min read
Tonsillitis
Guide to assessing acute tonsillitis, separating viral illness from group A streptococcal disease, using tests and antibiotics selectively, and recognising quinsy, airway compromise and sepsis in Indian care. It prioritises airway-first triage, hydration, analgesia, allergy safety, stewardship and return instructions over reflex treatment, while distinguishing recurrent symptoms from episodes. It is teaching, not a substitute for exam or emergency care, and supports clinical safety netting.
Summary
Tonsillitis is inflammation of the palatine tonsils, most often as part of a viral upper-respiratory infection. Group A Streptococcus (GAS) is an important bacterial cause, particularly in school-aged children and adolescents, but exudate, fever or tender nodes do not prove it. Cough, coryza, hoarseness, conjunctivitis, oral ulcers or diarrhoea make a viral cause more likely. Infectious mononucleosis, scarlet fever, acute HIV, gonococcal pharyngitis and non-infectious causes remain in the differential.
Assessment should begin with severity and airway, hydration and sepsis screening, followed by a focused history and examination. FeverPAIN or Centor criteria estimate the likelihood of streptococcal infection; they do not replace clinical judgement, and children under 3 years or patients with atypical illness need different reasoning. Rapid antigen detection or throat culture may help where results will change treatment and local testing is reliable.
Most uncomplicated episodes improve within about one week without antibiotics. Give analgesia, fluids and safety-netting. Reserve immediate or delayed antibiotics for people more likely to benefit, those with confirmed GAS according to local policy, or those at increased risk of complications. Explain that tonsil size and exudate can persist briefly after the infective phase, so visible appearance alone should not trigger another antibiotic course. This reviewed educational draft has been reviewed by the MedNext Clinical Team.
How Common Is It?
Acute sore throat and tonsillitis are frequent reasons for consultations, school absence and antibiotic requests. Viruses cause most cases, with seasonal clustering and spread through respiratory droplets and close contact. The appearance of white patches can be alarming but does not reliably distinguish viral from GAS infection. Many patients improve spontaneously, so the expected course should be explained before treatment decisions are made.
GAS pharyngitis is more common in children than adults and is uncommon in children younger than 3 years as an isolated sore throat syndrome. Indian epidemiology varies by age, setting, season and testing method; a prevalence estimate from a tertiary clinic should not be applied to every community. Crowded classrooms, hostels, military settings and households facilitate transmission.
The practical burden includes pain, inability to swallow, dehydration, sleep loss and repeated empiric antibiotic exposure. A patient may have recurrent episodes, chronic tonsillar symptoms, obstructive sleep symptoms or episodes that are actually glandular fever, reflux, allergy or another condition. Record episode frequency, severity, test results, complications and functional impact rather than labelling every sore throat “tonsillitis”.
Risk Factors
Exposure to respiratory infection, close-contact living, school attendance and winter or monsoon crowding increase transmission. Children, adolescents and people with frequent contact with them have higher GAS risk. Previous episodes do not prove that the next illness is bacterial. Smoking and indoor air pollution can irritate the throat and worsen symptoms without indicating an antibiotic need.
Risk of serious disease increases with inability to swallow fluids or saliva, immunosuppression, severe comorbidity, very young age, frailty or delayed presentation. Recent antibiotics may alter culture results and select resistant flora. Consider sexual exposure when pharyngeal gonorrhoea or acute HIV is plausible, using confidential, non-judgemental history.
A history of rheumatic fever, known valvular disease, household outbreak, scarlet-fever contact or an unusual local public-health situation may change the testing and treatment threshold. Recurrent tonsillitis requires accurate episode documentation; obstructive symptoms, peritonsillar abscess, sleep-disordered breathing and poor school attendance are different referral questions from repeated uncomplicated viral sore throats.
Diagnosis
History
Clarify onset, fever, pain severity, unilateral symptoms, swallowing and breathing, drooling, voice change, cough, coryza, conjunctivitis, oral ulcers, rash, abdominal pain, fatigue and neck swelling. Ask about exposure, previous episodes, antibiotics, allergy, immunisation, rheumatic fever, immunosuppression and relevant sexual exposure. Establish fluid intake and urine output. Rapid deterioration, trismus, muffled voice or inability to handle secretions is an urgency issue, not a scoring exercise.
Examination
Record temperature, pulse, respiratory rate, oxygen saturation and general appearance. Inspect the mouth and oropharynx for tonsillar erythema, exudate, ulcers, palatal petechiae, asymmetry, uvular deviation and pooling secretions. Assess trismus, voice, neck movement, cervical nodes, rash, hydration and work of breathing. Look for hepatosplenomegaly when mononucleosis is possible, while avoiding forceful examination. In children, assess behaviour and drinking.
Investigations
Use FeverPAIN (fever in the past 24 hours, purulence, attend rapidly within 3 days, severely inflamed tonsils, no cough or coryza) or Centor (tonsillar exudate, tender anterior cervical nodes, fever, absence of cough) consistently. These tools guide probability, not certainty. A rapid GAS antigen test can support treatment where available; a negative result may need culture confirmation in children according to local policy, while adults may be managed clinically depending on guidance. Throat culture is useful for selected recurrent, outbreak, atypical or treatment-failure cases. Test for EBV or other causes only when the history and examination make it relevant. Do not delay emergency airway management for a swab.
Differential Diagnosis
Viral pharyngotonsillitis commonly accompanies cough, rhinorrhoea, hoarseness, conjunctivitis or oral ulcers. Epstein–Barr virus can cause marked fatigue, posterior cervical nodes and hepatosplenomegaly; amoxicillin may produce a rash in infectious mononucleosis and is not a routine empirical choice when that diagnosis is plausible. Influenza, COVID-19 and other respiratory viruses may present with sore throat.
GAS is supported by fever, sudden onset, tonsillar inflammation or exudate, tender anterior nodes and absent cough, but overlap is substantial. Scarlet fever adds a sandpaper-like rash. Consider group C or G streptococci in selected outbreaks or persistent disease. Fusobacterium necrophorum is a concern in severe adolescent or young-adult pharyngitis, especially with systemic deterioration, but routine antibiotic treatment of every sore throat is not justified.
Peritonsillar abscess (quinsy) causes unilateral severe pain, trismus, muffled “hot potato” voice, drooling, uvular deviation and a unilateral bulging palate. Retropharyngeal or parapharyngeal infection, epiglottitis, diphtheria, Lemierre syndrome, malignancy and foreign body are less common but dangerous alternatives. Aphthae, reflux, allergy and irritant exposure can cause recurrent symptoms without tonsillitis.
Management
For uncomplicated illness, explain that symptoms commonly last about one week. Encourage small frequent fluids, soft foods, rest and avoidance of smoke. Paracetamol is a usual first-line analgesic or antipyretic when suitable; ibuprofen is an option when there is no contraindication. Use age- and weight-appropriate dosing and check combination cold remedies to avoid duplication. Warm saline gargles may comfort older children and adults who can gargle safely.
Use a no-antibiotic strategy for low FeverPAIN or Centor scores and for a clinically convincing viral syndrome. Consider a delayed or back-up prescription for intermediate probability when follow-up and safety-netting are reliable. Immediate antibiotics are considered for high scores, confirmed GAS where local policy supports treatment, scarlet fever, or patients at increased risk of complications. Antibiotics shorten symptoms modestly and do not make viral tonsillitis resolve faster.
When antibiotics are indicated, follow current Indian and institutional antimicrobial guidance for agent, dose and duration. current guidelines commonly uses a 5- to 10-day phenoxymethylpenicillin strategy depending on age and formulation, with alternatives for allergy; local resistance, availability and paediatric policy may differ. Review if not improving, if symptoms worsen rapidly or if a complication is suspected. Drainage and hospital treatment, not tablets alone, are needed for quinsy or deep-neck infection.
Prescribing Information
Check allergy history carefully: distinguish an immediate IgE-type reaction with urticaria, angioedema, wheeze or anaphylaxis from a delayed non-urticarial rash or gastrointestinal intolerance. Avoid the implicated beta-lactam in immediate severe allergy and use a guideline-supported alternative, considering local resistance and interactions. Do not prescribe amoxicillin reflexively when infectious mononucleosis is likely because a widespread rash can occur.
If GAS treatment is indicated, use the narrowest effective antibiotic and the recommended duration; do not extend or repeat courses solely because tonsils remain enlarged after the acute illness. Complete the prescribed course unless a clinician advises otherwise, and seek help for severe diarrhoea, anaphylaxis, mucosal blistering, jaundice or other serious reactions. Check pregnancy, renal function, anticoagulants and other medicines when selecting an alternative.
Antibiotic stewardship is part of patient safety. Explain that coloured mucus or exudate is not proof of bacteria, and that unnecessary antibiotics cause adverse effects and resistance. Do not use topical antiseptic-antibiotic mixtures, leftover antibiotics or injectable therapy for routine uncomplicated tonsillitis. Corticosteroids are not routine self-care; a single supervised dose may be considered in selected severe cases under local policy after airway and alternative diagnoses are assessed.
When to Refer
Send urgently to emergency or ENT care for drooling or inability to swallow saliva, stridor, respiratory distress, cyanosis, rapidly progressive neck swelling, severe trismus, muffled voice, unilateral palatal bulge or uvular deviation, toxic appearance, hypotension, altered consciousness or suspected sepsis. Keep the patient upright, avoid repeated throat manipulation, seek airway-skilled help and provide resuscitation according to local protocol. Do not wait for a throat swab.
Same-day assessment is appropriate for suspected quinsy, deep-neck infection, epiglottitis, Lemierre syndrome, severe dehydration, immunocompromise, persistent high fever, worsening unilateral pain or failure of oral treatment. Hospital care may require IV fluids, antibiotics, imaging, drainage and airway observation. A child who is not drinking or passing urine needs a lower threshold for referral.
Routine ENT referral can be considered for documented, disabling recurrent tonsillitis meeting local thresholds, recurrent quinsy, asymmetric tonsils, persistent unilateral symptoms, obstructive sleep-disordered breathing or suspected malignancy. Include dates, examination, tests, treatments, complications, school or work impact and response. Recurrent symptoms without documented acute tonsillitis should prompt consideration of alternative causes before surgery.
Red Flags
Airway red flags are stridor, noisy breathing, increasing work of breathing, inability to lie flat, drooling, inability to swallow secretions, cyanosis, muffled voice, severe trismus or rapidly enlarging unilateral swelling. Sepsis red flags include confusion, mottled skin, severe lethargy, tachypnoea, hypotension, persistent tachycardia, rigors and markedly reduced urine output. These require emergency assessment and resuscitation, not outpatient scoring.
Consider quinsy when severe unilateral throat pain radiates to the ear, the voice changes, mouth opening is restricted and the uvula is displaced. Consider deep-neck infection or Lemierre syndrome when fever persists or returns with rigors, unilateral neck swelling, chest pain, breathlessness or systemic toxicity. Suspect epiglottitis with severe odynophagia, drooling and a relatively normal-looking oropharynx; do not force a tongue depressor examination in a distressed patient.
A widespread rash, mucosal lesions, jaundice, wheeze, facial swelling or collapse after an antibiotic may indicate a serious drug reaction. Persistent unilateral tonsillar enlargement, bleeding, neck mass, weight loss or referred ear pain needs ENT evaluation. Worsening after 48–72 hours of treatment, no improvement by about one week or recurrent severe episodes require reassessment.
Indian Clinical Context
current guidelines is a useful antimicrobial-stewardship reference, but Indian clinicians must apply current national, state and institutional protocols, local GAS testing access and antibiotic availability. Many settings lack rapid antigen testing, so a consistent clinical score, examination and safety-net plan are important. Do not present a UK threshold as an Indian law. Where rheumatic fever risk, outbreaks or public-health advice changes the balance, consult local specialists.
Crowded schools, hostels, military facilities and households can amplify transmission. Give practical advice about hand hygiene, ventilation, not sharing utensils and staying away from close contact while febrile or until the locally recommended period after effective GAS treatment. Avoid stigma and do not assume that every exudative throat requires a broad-spectrum antibiotic.
India has substantial over-the-counter antibiotic access and variable follow-up. A prescription should state the diagnosis being treated, the medicine, duration, allergy warning, expected course and return precautions. Consider tuberculosis, diphtheria, HIV with consent, malaria or other febrile illnesses only when epidemiology and clinical findings support them. For a suspected quinsy or airway problem, referral to the nearest capable emergency or ENT service is more important than obtaining a perfect outpatient label.
At every visit, record the ability to drink, urine output, respiratory effort and responsible adult contact for a child. If follow-up is uncertain, give written return instructions and identify the nearest emergency facility. A low score does not overrule a toxic appearance, and lack of a test does not justify a broad-spectrum prescription by default.
NMC Competency Mapping
Tonsillitis integrates NMC CBME competencies in ENT, microbiology, pharmacology, paediatrics, general medicine, emergency care and AETCOM. At Know level, learners should describe viral and GAS presentations, the FeverPAIN and Centor components, common complications and antibiotic adverse effects. They should recognise that exudate is not synonymous with bacterial disease and that quinsy can threaten the airway.
At Know How level, learners should take a focused throat and airway history, assess hydration and sepsis, perform a safe oral and neck examination, apply a clinical score, select a test when it will change management and choose no, delayed or immediate antibiotic treatment rationally. They should explain penicillin allergy, infectious mononucleosis, stewardship and the need for urgent ENT referral in quinsy.
At Show How level, a learner can counsel a parent about fluids and analgesia, safety-net a low-score illness, identify unilateral palatal swelling and escalate a deteriorating patient using structured communication. Airway management, drainage, paediatric prescribing and antibiotic selection for complicated infection require supervision and institutional protocols. AETCOM includes shared decisions, respectful examination, confidentiality and clear communication when a patient expects antibiotics.
Key Exam Pearls for NEET PG
Most acute tonsillitis is viral and settles in about one week. Cough, coryza, hoarseness, conjunctivitis and oral ulcers favour viral disease. FeverPAIN includes fever, purulence, rapid attendance, inflamed tonsils and no cough or coryza; Centor includes tonsillar exudate, tender anterior nodes, fever and absent cough. Scores estimate probability and do not replace airway assessment.
Low scores generally need no antibiotic; intermediate scores may suit a back-up prescription, and high scores or confirmed GAS may justify immediate treatment under local guidance. Use narrow-spectrum therapy for the recommended duration and check allergy. Amoxicillin can cause a prominent rash in infectious mononucleosis. Routine broad-spectrum antibiotics, injections and topical antibiotic mixtures are poor stewardship.
Quinsy presents with unilateral pain, trismus, muffled voice, drooling, palatal bulge and uvular deviation; it needs same-day ENT care and usually drainage plus antimicrobial treatment. Stridor, inability to handle secretions, severe toxicity or suspected epiglottitis are airway emergencies. Recurrent sore throat should be documented before tonsillectomy is considered. The safest exam sequence is airway, breathing, circulation, hydration, focused throat examination, probability assessment, targeted testing and a documented safety net. A score never outranks a toxic appearance, and a negative swab never makes a threatened airway safe.
Frequently Asked Questions
Does white exudate mean that antibiotics are needed?
No. Tonsillar exudate occurs in viral infections, infectious mononucleosis and GAS. Look at the whole syndrome: cough or coryza supports a virus, while fever, rapid onset, tender anterior nodes, inflamed tonsils and absent cough increase the likelihood of GAS. Use FeverPAIN or Centor consistently, test when the result will change treatment and give analgesia and safety-netting. Exudate alone is not a safe antibiotic rule. Also assess drinking, breathing, voice, asymmetry and the speed of deterioration before considering probability scores. A child who cannot drink, is unusually sleepy or has reduced urine output needs urgent assessment even if the tonsils look only mildly inflamed. A unilateral painful throat with trismus is not managed by a routine delayed prescription. Record the score, test result and safety-net advice so later clinicians can distinguish recurrence from persistence.
How should a penicillin allergy change treatment?
Clarify what happened, when it happened and which drug caused it. Anaphylaxis, wheeze, angioedema or immediate hives is different from delayed nausea or a non-urticarial rash. Avoid the implicated beta-lactam in a severe immediate reaction and choose a guideline-supported alternative after checking local resistance, interactions, pregnancy and renal function. Document the reaction accurately; an incorrect allergy label can lead to broader, less suitable antibiotics.
When is a sore throat a quinsy or airway emergency?
Severe unilateral pain with trismus, a muffled voice, drooling, a bulging palate or uvular deviation suggests peritonsillar abscess and needs same-day ENT or emergency assessment. Stridor, respiratory distress, inability to swallow saliva, cyanosis, rapidly progressive neck swelling, confusion or shock are airway or sepsis emergencies. Keep the patient upright, avoid forceful throat examination, seek airway-skilled help and do not delay escalation for a swab.
How long should antibiotics be given for GAS tonsillitis?
Use the current Indian or institutional guideline and the prescribed agent, because recommended durations and formulations vary by age, allergy, resistance and public-health context. A narrow-spectrum penicillin course is commonly used when GAS treatment is indicated; do not invent a dose from a general article. Explain adherence, avoid leftover medicines and review if symptoms worsen, fail to improve within the expected course or recur with complications. The correct duration belongs on the prescription after age, weight, allergy and renal function are checked. A clinician should also explain what to do after a missed dose and when a delayed prescription should be collected, with clear written safety-net instructions.
Inside MedNext for this topic
- 411 MedNext-authored chapters
- 80,000+ MCQ bank
- 15 study modes
- a growing library of visual revision sheets
Study modes
- Notes
- MCQ
- Audio
- Video
- Visual
- 3D Anatomy
- Trace
- Flashcards
- Mnemonics
- Image Bank
- Clinical
- Microscopy
- Audio QBank
- Cadaver
- Book Match
Continue reading
Clinical GuidesAll Clinical Guides
Browse all clinical management guides for Indian medical practice.
Test your knowledge
Attempt structured MCQs on this topic to consolidate your understanding and connect the guide to exam-focused practice.
Try MCQs on this topic