Acute otitis media (AOM) is a bacterial infection of the middle ear, occurring almost exclusively after a viral upper respiratory tract infection, and is the most common diagnosis in childhood acute sick visits. By age 3, 50–85% of children will have had at least one episode. [1-2] Common pathogens include Streptococcus pneumoniae, nontypable Haemophilus influenzae, and Moraxella catarrhalis. [1]
The following algorithm from the 2025 NEJM review illustrates the key diagnostic distinction between AOM and otitis media with effusion (OME):
1. History
- Key HPI questions: Ear pain (or ear tugging/rubbing/holding in preverbal children), fever, irritability, difficulty sleeping, otorrhea, decreased hearing, anorexia, vomiting [1-2]
- Timing/triggers: Symptoms typically develop ~4 days after onset of a viral URI [1]
- Severity: Moderate-to-severe otalgia, otalgia ≥48 hours, or temperature ≥39°C (102.2°F) defines severe AOM [3]
- Important negatives: Absence of bulging TM, absence of URI symptoms, unilateral vs. bilateral involvement, prior antibiotic use within 30 days [1][4]
2. Alarm Features
- Postauricular swelling, erythema, or pinna protrusion → suspect mastoiditis [5-6]
- Mastoid tenderness with systemic toxicity
- Headache, meningismus, neck rigidity, seizures, or focal neurological deficits → intracranial complications (meningitis, brain abscess, subdural empyema, dural venous sinus thrombosis) [5]
- Vertigo or sensorineural hearing loss → labyrinthitis [1]
- Facial nerve palsy [1]
- Failure to improve after 48–72 hours of appropriate antibiotics [5]
- Toxic-appearing child or infant <6 months with high fever
3. Medications
First-line treatment
- High-dose amoxicillin[1-3]
Switch to amoxicillin-clavulanate (90 mg/kg/day amoxicillin component, 14:1 ratio, BID) if: [1][3]
- Amoxicillin used in the prior 30 days
- Concurrent purulent conjunctivitis (conjunctivitis-otitis syndrome)
- Spontaneous TM perforation
Penicillin allergy: Cefdinir (14 mg/kg/day), cefuroxime (30 mg/kg/day BID), or cefpodoxime (10 mg/kg/day BID). Azithromycin is an option but has inferior pneumococcal coverage [2-3]
Refractory AOM: IM ceftriaxone 50 mg/kg/day × 3 days; consider tympanocentesis [1]
Analgesics: Acetaminophen or ibuprofen should be recommended for all patients with AOM [4][7]
Contraindicated/not recommended
- Antihistamines and decongestants are not effective for AOM and are associated with adverse effects (drowsiness, diarrhea, rash, persistence of middle-ear effusion) [1][8]
- Systemic corticosteroids lack evidence of benefit for AOM [9]
4. Diet
- No specific dietary triggers or restrictions for AOM
- Hydration is important, especially in febrile children
- Encourage continued breastfeeding in infants (also protective against recurrence) [1-2]
- Avoid supine bottle feeding ("bottle propping"), which is associated with increased AOM risk [3]
5. Review of Systems
- ENT: Ear pain, otorrhea, hearing changes, nasal congestion, rhinorrhea, sore throat
- Neurologic: Headache, irritability, lethargy, facial weakness, vertigo, seizures (red flags for complications)
- Constitutional: Fever, poor feeding, sleep disturbance
- GI: Vomiting, diarrhea (may be presenting symptom in young children, or antibiotic side effect)
- Ophthalmologic: Concurrent conjunctivitis (suggests H. influenzae; warrants amoxicillin-clavulanate) [1]
6. Collateral History and Family History
- Family history of recurrent AOM is a significant risk factor (RR 2.63) [10-11]
- Daycare setting and number of children in the group [1][12]
- Tobacco smoke exposure in the household [1][11]
- Breastfeeding duration [13-14]
- Pacifier use [3][11]
- Immunization status (pneumococcal conjugate vaccine, influenza vaccine) [1-2]
7. Risk Factors
- Day care attendance (strongest modifiable risk factor; RR 2.45) [11-12]
- Age <2 years (peak incidence 6–12 months) [1][13]
- Male sex [1][13]
- Family history of recurrent AOM (RR 2.63) [11]
- Parental/household smoking (RR 1.66) [1][11]
- Short duration of breastfeeding (<3–6 months) [10][14]
- Pacifier use (RR 1.24) [3][11]
- Preceding viral URI (antecedent event in nearly all cases) [1]
- Down syndrome, immunodeficiency (e.g., hypogammaglobulinemia) [1]
- Siblings (increased URI exposure) [15]
8. Differential Diagnosis
- Otitis media with effusion (OME): Middle-ear effusion without signs of acute infection (no bulging TM); does NOT require antibiotics [1][7]
- Otitis externa: Pain with tragal pressure or pinna traction; canal edema/debris; TM typically normal
- Referred otalgia: Dental pathology, TMJ dysfunction, pharyngitis, cervical lymphadenopathy
- Foreign body in the ear canal
- Mastoiditis: Cannot-miss complication; postauricular swelling/erythema, pinna protrusion [6]
- Cholesteatoma: Chronic foul-smelling otorrhea, conductive hearing loss, TM retraction pocket
- Myringitis (bullous): Hemorrhagic bullae on TM; may coexist with AOM [1]
9. Past Medical History
- Prior AOM episodes (recurrent AOM = ≥3 in 6 months or ≥4 in 12 months with ≥1 in past 6 months) [3]
- Prior tympanostomy tube placement
- History of OME or hearing loss
- Craniofacial anomalies (cleft palate)
- Immunodeficiency states
- Allergies to penicillin or other antibiotics
- Recent antibiotic use (within 30 days) [1]
10. Physical Exam
Key findings
- Otoscopy is the cornerstone of diagnosis. A bulging tympanic membrane is the defining feature of AOM [1]
- Moderate-to-severe TM bulging, or mild bulging with recent-onset ear pain (<48 hrs) or intense TM erythema [3-4]
- New-onset otorrhea (not from otitis externa) [2]
- Opacification of TM, obscured landmarks (short process, malleus) [1]
- Pneumatic otoscopy: Decreased or absent TM mobility confirms middle-ear effusion [8]
Concerning findings (complications)
- Postauricular erythema, swelling, tenderness, or pinna protrusion → mastoiditis [6]
- Facial nerve palsy
- Signs of meningeal irritation
Pearl: Isolated TM erythema without bulging is insufficient for AOM diagnosis — crying alone can cause TM redness [1]
11. Lab Studies
- Routine labs are not indicated for uncomplicated AOM
- In toxic-appearing children or suspected complications: CBC, CRP, blood cultures, procalcitonin
- Normal WBC and inflammatory markers do not exclude mastoiditis [6]
- Tympanocentesis with culture/sensitivity for refractory cases failing multiple antibiotic courses [1]
12. Imaging
- Imaging is NOT indicated for uncomplicated AOM [5][16]
- Suspected complications (mastoiditis, intracranial extension):
- First-line: CT temporal bone with IV contrast — high spatial resolution for coalescent mastoiditis, bony erosion, subperiosteal abscess [5-6]
- Intracranial complications: MRI brain with IV contrast is superior for detecting epidural/subdural empyema, brain abscess, dural venous sinus thrombosis, labyrinthitis [5][17]
- CT and MRI are complementary in complicated cases [5][18]
13. Special Tests
- Pneumatic otoscopy: Gold standard bedside tool for confirming middle-ear effusion (decreased TM mobility) [8]
- Tympanometry: Objective measure of middle-ear pressure; type B (flat) tracing indicates effusion [3]
- Acoustic reflectometry: Alternative for confirming effusion
- Tympanocentesis: Diagnostic and therapeutic in refractory cases; allows culture of middle-ear fluid [1]
14. ECG
- Not applicable for otitis media
- No routine indication for ECG
15. Assessment
AOM is classified by the AAP as: [3]
- Nonsevere: Mild otalgia, temperature <39°C
- Severe: Moderate-to-severe otalgia, otalgia ≥48 hours, or temperature ≥39°C
Observation vs. antibiotics (per AAP guidelines): [3-4]
- Immediate antibiotics required: All children <6 months; children 6–23 months with bilateral AOM or severe symptoms; children ≥2 years with severe symptoms
- Observation appropriate: Children 6–23 months with mild, unilateral AOM; children ≥2 years with mild symptoms (unilateral or bilateral) — with a safety-net prescription and follow-up in 48–72 hours
Complications are rare but serious: mastoiditis (~2–4 per 10,000), facial nerve palsy, labyrinthitis, meningitis, intracranial abscess, dural venous sinus thrombosis [1][5]
16. Treatment Plan
Initial stabilization
Antibiotic therapy (when indicated)
Key treatment pearls
- A 10-day course is preferred in children <24 months; 5-day courses showed approximately double the treatment failure rate in this age group [1]
- Topical antibiotic drops (e.g., ofloxacin) are preferred for otorrhea in children with tympanostomy tubes [1]
- Tympanocentesis for refractory cases failing multiple antibiotic courses [1]
Surgical referral
17. Disposition
- Discharge: Vast majority of uncomplicated AOM — with analgesics ± antibiotics or safety-net prescription
- Observation/admission criteria:
- Toxic-appearing child
- Suspected mastoiditis or intracranial complication
- Inability to tolerate oral medications (may need IV antibiotics)
- Infants <2 months with fever
- Failed outpatient therapy with worsening symptoms
- Specialist consultation:
- ENT: Recurrent AOM, refractory AOM, suspected mastoiditis or cholesteatoma, hearing loss, anatomic abnormalities [2][7]
- Neurosurgery: Intracranial complications (abscess, empyema)
18. Follow Up / Return Precautions
Follow-up timing
- If on observation (watchful waiting): Reassess in 48–72 hours if no improvement; fill rescue antibiotic prescription [3]
- If on antibiotics: Reassess if no improvement in 48–72 hours; switch to second-line agent [7]
- Routine follow-up at 2–4 weeks not required if symptoms resolve; consider for children <2 years or with recurrent episodes
Return precautions — instruct parents to return immediately for:
- Worsening ear pain or new ear drainage
- High fever (≥39°C) or fever not improving
- Swelling, redness, or tenderness behind the ear
- Increasing irritability, lethargy, or poor feeding
- Headache, stiff neck, vomiting, or any neurological changes
- Facial drooping
Patient counseling
- AOM often follows a cold; most cases improve within 2–3 days even without antibiotics [1]
- Complete the full antibiotic course if prescribed
- Preventive measures: pneumococcal and influenza vaccination, breastfeeding ≥6 months, avoid tobacco smoke exposure, reduce pacifier use after 6 months, consider smaller daycare settings [1-3]
References
1. Otitis Media in Young Children. — Shaikh N. The New England Journal of Medicine. 2025.
2. Otitis Media: Rapid Evidence Review. — Gaddey HL, Wright MT, Nelson TN. American Family Physician. 2019.
3. The Diagnosis and Management of Acute Otitis Media. — Lieberthal AS, Carroll AE, Chonmaitree T, et al. Pediatrics. 2013.
4. Antibiotic Use in Acute Upper Respiratory Tract Infections. — Sur DKC, Plesa ML. American Family Physician. 2022.
5. ACR Appropriateness Criteria® Inflammatory Ear Disease. — Agarwal M, Juliano AF, Hagiwara M, et al. Journal of the American College of Radiology : JACR. 2025.
6. High Risk and Low Prevalence Diseases: Acute Mastoiditis. — Bridwell RE, Koyfman A, Long B. The American Journal of Emergency Medicine. 2024.
7. Otitis Media: Diagnosis and Treatment. — Harmes KM, Blackwood RA, Burrows HL, et al. American Family Physician. 2013.
8. Decongestants and Antihistamines for Acute Otitis Media in Children. — Darlison P, Moresco L, Nussbaumer-Streit B, et al. The Cochrane Database of Systematic Reviews. 2025.
9. Systemic Corticosteroids for Acute Otitis Media in Children. — Ranakusuma RW, Pitoyo Y, Safitri ED, et al. The Cochrane Database of Systematic Reviews. 2018.
10. Otitis Media. — Rovers MM, Schilder AG, Zielhuis GA, Rosenfeld RM. Lancet. 2004.
11. A Meta-Analytic Review of the Risk Factors for Acute Otitis Media. — Uhari M, Mäntysaari K, Niemelä M. Clinical Infectious Diseases : An Official Publication of the Infectious Diseases Society of America. 1996.
12. Acute Otitis Media During Infancy: Parent-Reported Incidence and Modifiable Risk Factors. — Prins-van Ginkel AC, Bruijning-Verhagen PC, Uiterwaal CS, et al. The Pediatric Infectious Disease Journal. 2017.
13. Epidemiology of Acute Otitis Media in the Postpneumococcal Conjugate Vaccine Era. — Kaur R, Morris M, Pichichero ME. Pediatrics. 2017.
14. Risk of Childhood Otitis Media With Focus on Potentially Modifiable Factors: A Danish Follow-Up Cohort Study. — Kørvel-Hanquist A, Koch A, Lous J, Olsen SF, Homøe P. International Journal of Pediatric Otorhinolaryngology. 2018.
15. Environmental Determinants Associated With Acute Otitis Media in Children: A Longitudinal Study. — van Ingen G, le Clercq CMP, Touw CE, et al. Pediatric Research. 2020.
16. ESR Essentials: Acute Infections of the Head and Neck-Practice Recommendations by the European Society of Head and Neck Radiology. — Hirvonen J, Lingam RK, Connor S. European Radiology. 2025.
17. Imaging of Complications of Acute Mastoiditis in Children. — Vazquez E, Castellote A, Piqueras J, et al. Radiographics : A Review Publication of the Radiological Society of North America, Inc. 2003.
18. Advanced Imaging of Head and Neck Infections. — Baba A, Kurokawa R, Kurokawa M, et al. Journal of Neuroimaging : Official Journal of the American Society of Neuroimaging. 2023.