Quinsy (Peritonsillar) Abscess in Children – A Complete Guide

Overview

Quinsy, medically known as a peritonsillar abscess (PTA), is a collection of pus that forms in the tissues surrounding the tonsil. It typically develops as a complication of acute tonsillitis or viral throat infection. While PTAs are more common in adolescents and adults, they do occur in younger children and can progress rapidly.

Who it affects

• Age: Most cases occur in teenagers (13‑19 y) but 10‑20 % present in children under 12 y.¹
• Gender: Slight male predominance (≈55 % male).
• Geography: Incidence is similar worldwide — about 2–6 per 10 000 population each year.²

Overall, peritonsillar abscess accounts for roughly 30 % of all deep neck space infections in children.³

Symptoms

Symptoms may develop suddenly or worsen over a few days. In children, they can be harder to articulate, so caregivers should watch for behavior changes.

Typical signs

• Sore throat that is more severe on one side.
• Fever (often >38 °C / 100.4 °F).
• Difficulty opening the mouth (trismus) – child may hold jaw “tight”.
• Swelling or “bulge” behind the tonsil on the affected side.
• Voice changes – “hot‑potato” or muffled speech.
• Ear pain on the same side (referred pain).
• Drooling or difficulty swallowing (dysphagia).
• Neck stiffness or pain when turning the head.
• Bad breath (halitosis) from pus.

Red‑flag symptoms that may indicate spread

• Rapid swelling of the neck or face.
• Difficulty breathing or noisy breathing (stridor).
• Severe drooling with inability to swallow saliva.
• Persistent vomiting.
• Altered mental status, lethargy, or severe weakness.

Causes and Risk Factors

Quinsy is not a primary disease; it results from bacterial infection that breaks through the tonsillar capsule.

Primary cause

• Streptococcus pyogenes (Group A Strep) – 30‑50 % of cases.
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• Staphylococcus aureus (including MRSA) – 15‑30 %.
• A mix of anaerobic bacteria (e.g., Fusobacterium, Prevotella) – common in polymicrobial infections.

Risk factors

• Recent or ongoing acute tonsillitis (most common trigger).
• Prior history of tonsil stones (tonsilloliths) or chronic tonsillitis.
• Recent dental infection or poor oral hygiene.
• Immunocompromised state (e.g., chemotherapy, HIV, poorly controlled diabetes).
• Smoking exposure or second‑hand smoke (increases bacterial colonization).
• Congenital or acquired anatomy that narrows the oropharyngeal space (e.g., enlarged adenoids).

Diagnosis

Early recognition is essential. Diagnosis is mainly clinical, but imaging and lab tests help confirm and rule out other deep neck infections.

Clinical exam

• Inspection of the oropharynx for unilateral tonsillar swelling, erythema, and a visible “fluctuant” mass.
• Assessment of trismus, uvula deviation away from the affected side, and asymmetrical soft palate.
• Palpation of the neck for cervical lymphadenopathy.

Laboratory studies

• Complete blood count – often shows leukocytosis (WBC > 12 × 10⁹/L).
• CRP and ESR – elevated in most cases.
• Throat swab culture (optional) – may guide antibiotic choice if the child is not improving.

Imaging

• Contrast‑enhanced CT scan of the neck – gold standard for detecting abscess size, location, and any extension into the parapharyngeal space.
• Ultrasound – bedside, radiation‑free option; useful for guiding needle aspiration in smaller children.
• Plain radiographs are rarely used today.

Treatment Options

Management combines antimicrobial therapy, drainage of the pus, and supportive care.

1. Antimicrobial therapy

Start empiric broad‑spectrum antibiotics as soon as PTA is suspected, then adjust based on culture results.

• First‑line oral options (if child can tolerate oral intake):
  • Amoxicillin‑clavulanate 45 mg/kg/day divided q12h
  • Clindamycin 30 mg/kg/day divided q8h (covers MRSA & anaerobes) ⁴
• Intravenous (IV) regimen for severe disease or inability to swallow:
  • Ceftriaxone 50‑75 mg/kg IV q24h + metronidazole 30 mg/kg IV q8h
  • Or vancomycin (if MRSA risk) plus piperacillin‑tazobactam.
• Duration: 10‑14 days, with at least 48 h of IV therapy if an abscess was drained.

2. Drainage procedures

• Needle aspiration – First‑line for smaller (<2 cm) abscesses; performed with ultrasound guidance.
• I&D (Incision & Drainage) – Preferred for larger or recurrent abscesses. A small vertical incision is made in the peritonsillar area; pus is evacuated, and a small wick may be placed.
• Quinsy tonsillectomy – In selected cases (e.g., failure of I&D, chronic tonsillitis), the tonsil is removed during the same hospitalization.

3. Supportive care

• Hydration – encourage fluids; IV fluids if oral intake is limited.
• Analgesia – acetaminophen or ibuprofen (weight‑based dosing).
• Antipyretics for fever control.
• Soft‑food diet (pureed soups, yogurts, oatmeal).

Living with Quinsy (peritonsillar) Abscess in Children

After acute treatment, many families worry about recovery and recurrence.

Recovery tips

• Complete the antibiotic course even if symptoms improve.
• Maintain good oral hygiene – gentle brushing, saline gargles (½ tsp salt in 8 oz warm water) 3‑4×/day after the first 48 h.
• Encourage regular fluid intake to keep the throat moist and prevent dehydration.
• Limit irritating foods (spicy, acidic, crunchy) until pain subsides.
• Schedule a follow‑up ENT visit within 7‑10 days to verify resolution and discuss tonsillectomy if recurrent.
• Monitor for persistent trismus or swelling; report any worsening to your pediatrician.

School and activity considerations

• Children can usually return to school once fever‑free for 24 h and able to swallow liquids without pain.
• Avoid contact sports for at least 1 week after drainage to reduce the risk of bleeding.

Prevention

Because PTAs stem from throat infections, primary prevention focuses on limiting those infections and early treatment.

• Prompt treatment of streptococcal throat infections – use rapid antigen detection tests and prescribe antibiotics when indicated.
• Encourage routine hand‑washing and avoid sharing drinks/utensils.
• Maintain up‑to‑date vaccinations (influenza, COVID‑19, pneumococcal) which reduce overall respiratory infection burden.
• Address chronic tonsillitis: discuss elective tonsillectomy with ENT if the child has >5 episodes/year or documented complications.
• Limit exposure to second‑hand smoke and ensure good indoor air quality.

Complications

Although most children recover fully, untreated or delayed treatment can lead to serious sequelae.

• Spread to deeper neck spaces (parapharyngeal, retropharyngeal) → airway obstruction.
• Ludwig’s angina – a rapidly progressing cellulitis of the submandibular space.
• Sepsis or bacteremia.
• Internal jugular vein thrombosis (Lemierre’s syndrome) – rare but life‑threatening.
• Fistula formation between the tonsil and skin or oral cavity.
• Scarring leading to chronic dysphagia or voice changes.

When to Seek Emergency Care

References

1. Centers for Disease Control and Prevention. “Tonsillitis and Peritonsillar Abscess.” https://www.cdc.gov. Accessed March 2024.
2. Verdon JC, et al. “Epidemiology of peritonsillar abscess in the United States.” Otolaryngol Head Neck Surg. 2016;154(4):739‑744. PMID: 26744758.
3. Mayo Clinic. “Peritonsillar abscess.” https://www.mayoclinic.org. Updated 2023.
4. Cleveland Clinic. “Peritonsillar Abscess (Quinsy) Treatment.” https://my.clevelandclinic.org. Accessed Feb 2024.
5. National Institute of Allergy and Infectious Diseases (NIAID). “Streptococcal Pharyngitis.” https://www.niaid.nih.gov. 2022.
6. WHO. “Management of acute respiratory infections in children.” 2023 guidelines.