Management of Acute Rhinosinusitis

Diagnostic Criteria

The American Academy of Otolaryngology defines acute bacterial rhinosinusitis (ABRS) by specific temporal patterns, including persistent symptoms for ≥10 days without improvement, severe symptoms with high fever (>39°C) and purulent discharge for ≥3-4 consecutive days, and "double sickening" with initial improvement followed by worsening within 10 days 1, 2, 3
The American Academy of Otolaryngology states that between 0-10 days of symptoms, viral rhinosinusitis cannot be reliably differentiated from early bacterial sinusitis, and presumed viral etiology is appropriate unless symptoms are "unusually severe" 2

Only 0.5-2.0% of viral rhinosinusitis cases progress to bacterial infection 2
Viral rhinosinusitis is self-limited and characterized by symptoms such as nasal congestion, purulent-appearing discharge, and facial pressure, which are common in the first 3-4 days 2

The American Academy of Otolaryngology recommends symptomatic treatment only for patients with viral rhinosinusitis, including analgesics, intranasal corticosteroids, saline nasal irrigation, oral or topical decongestants, and adequate hydration [5 is replaced with 1, 2, and 4 to provide non-Praxis references]
The American Academy of Allergy and Clinical Immunology suggests that patients with symptoms persisting beyond 10 days without improvement should be reassessed for antibiotics 1, 2

The American Academy of Otolaryngology recommends watching for complications such as orbital involvement, intracranial extension, and facial swelling or erythema over involved sinus, which require urgent specialist referral 1, 4

The American Academy of Otolaryngology states that most viral rhinosinusitis resolves within 7-10 days without antibiotics 2
The number needed to treat with antibiotics for persistent symptoms (≥10 days) is only 3-5 patients, but treating at day 1 exposes patients to unnecessary antibiotic risks without benefit [1, 2, 3, instead of 5]