Management of Peritonsillar Abscess
The appropriate management of peritonsillar abscess consists of drainage (needle aspiration or incision and drainage), antibiotics effective against group A streptococcus and oral anaerobes (amoxicillin-clavulanate as first-line), corticosteroids, and supportive care with analgesia and hydration—most patients can be managed as outpatients. 1
Immediate Treatment Algorithm
Drainage Procedure
- Perform drainage via needle aspiration or incision and drainage as the primary intervention 1, 2
- Both methods are equally effective; needle aspiration is less invasive and can be attempted first
- Incision and drainage is preferred if needle aspiration fails or for larger abscesses
- Send aspirate for culture and sensitivity 3
Pharmacologic Management
Antibiotics:
- Amoxicillin-clavulanate is first-line therapy (most commonly prescribed at 61% of cases) 3
- Must cover group A streptococcus and oral anaerobes 1
- Duration: 10 days is most common (prescribed by 54% of clinicians), though range is 5-14 days 3
- Initial dose can be given intravenously (1.2g co-amoxiclav) for outpatient management 4
Corticosteroids:
- Administer dexamethasone 4mg IV at initial presentation 4
- Reduces symptoms and speeds recovery 5
- This mirrors the strong recommendation for intraoperative dexamethasone in tonsillectomy patients 6
Analgesia:
- Provide non-opioid analgesics (NSAIDs, acetaminophen) 3
- Reserve opioids for severe pain only
Inpatient vs Outpatient Decision
Most patients (91%) can be managed as outpatients successfully with high patient satisfaction (93%) 4.
Admit if:
- Airway compromise or severe trismus preventing oral intake
- Inability to tolerate oral medications
- Suspected deep neck space extension
- Failed outpatient management
- Immunocompromised status
Role of Imaging
- Clinical diagnosis is sufficient in typical presentations (fever, unilateral pharyngodynia, "hot potato" voice, uvular deviation, trismus) 1
- CT scanning is reserved for suspected parapharyngeal extension or deep neck space infection 2
- Intraoral ultrasound can be helpful diagnostically but is not routinely necessary 5
Tonsillectomy Considerations
Tonsillectomy is NOT routinely indicated for a single peritonsillar abscess. The 2019 AAO-HNS guideline specifies that tonsillectomy should be considered as a modifying factor only with history of >1 peritonsillar abscess 6.
Key evidence:
- Ipsilateral recurrence rate after drainage alone is only 2.8% 2
- No contralateral recurrences occurred in the largest published cohort 2
- Immediate ("hot") tonsillectomy carries 11.4% postoperative bleeding risk and longer recovery 2
- Patients who underwent bilateral tonsillectomy had higher rates of work absence due to subsequent pharyngitis 2
Reserve tonsillectomy for:
- Recurrent peritonsillar abscess (>1 episode) 6
- Failed drainage procedures during same admission
- Meets separate criteria for recurrent tonsillitis (≥7 episodes in past year, ≥5/year for 2 years, or ≥3/year for 3 years) 6
Follow-Up
- Arrange follow-up in approximately 12-13 days (average 12.5 days per current practice) 3
- Can be with primary care or ENT
- Assess for resolution, antibiotic response, and need for interval tonsillectomy if recurrent
Common Pitfalls
- Avoid routine bilateral tonsillectomy for single PTA: The evidence strongly favors drainage alone with very low recurrence rates 2
- Don't skip corticosteroids: They provide significant symptomatic benefit 4, 5
- Don't routinely order CT: Reserve for suspected complications, not straightforward cases 2
- Don't assume admission is necessary: 91% can be managed outpatient with proper protocol 4
- Laboratory values (WBC, CRP) do not predict need for tonsillectomy 2