Scope of this summary
Adults with suspected acute viral or bacterial rhinosinusitis or possible chronic rhinosinusitis. This summary does not cover pediatric sinusitis, invasive fungal disease, facial trauma, postoperative care, malignancy or detailed endoscopic surgery. The AAO-HNSF webpage contains an inconsistent target-age statement, so no unsupported age-50 threshold is imported.
The Bottom Line
- Differentiate acute bacterial rhinosinusitis from viral illness by a persistent course without improvement, severe early illness or clear worsening after initial improvement; purulent discharge alone does not establish bacterial disease.
- Avoid routine sinus radiography or advanced imaging for uncomplicated acute disease; image when a complication or alternative diagnosis is suspected and use objective evidence to confirm chronic sinonasal inflammation.
- Offer watchful waiting for uncomplicated bacterial disease when follow-up is reliable, or discuss antibiotics; if an antibiotic is selected, AAO-HNSF recommends amoxicillin with or without clavulanate for most adults.
- Manage chronic rhinosinusitis as a distinct condition with duration, symptom pattern and objective inflammation, while assessing asthma, allergy, immune function, ciliary disease and modifying comorbidities when indicated.
Practical clinical workflow
1
Document onset and trajectory, nasal obstruction, discharge, facial pain or pressure, smell change, fever, dental symptoms, unilateral features, prior episodes, allergy, asthma, immune status and recent antibiotics.
2
Classify the episode as viral, likely bacterial, recurrent acute or chronic; perform focused nasal, orbital, neurologic, dental and ear examination and reserve tests for a question that changes management.
3
Provide analgesia, saline irrigation and source-supported intranasal therapy as appropriate; agree on watchful waiting or antibiotic treatment with an explicit reassessment point and adverse-effect counseling.
4
For persistent chronic symptoms, confirm inflammation by anterior rhinoscopy, nasal endoscopy or computed tomography and refer when diagnosis, complications, recurrent disease or procedural options require specialist care.
Safety boundaries and escalation
- Periorbital edema, painful or restricted eye movement, reduced vision, diplopia, severe frontal headache, meningism, focal neurologic signs or altered mental status requires emergency assessment for orbital or intracranial spread.
- Immunocompromise, poorly controlled diabetes, tissue necrosis or cranial neuropathy raises concern for invasive fungal disease and cannot follow an uncomplicated watchful-waiting pathway.
- Unilateral persistent bleeding, facial numbness, a mass, severe dental disease or repeated one-sided symptoms should prompt evaluation for an alternative structural, dental or neoplastic cause.
- Avoid routine macrolide empiric treatment for acute bacterial disease because CDC cites high pneumococcal resistance; reconcile allergy labels and local susceptibility before selecting an alternative.
Localization
Insurance authorization for CT or endoscopy must not delay emergency evaluation of suspected complications.
Source documents
Use the linked source documents for complete recommendations, evidence grading, exclusions and implementation detail.
- American Academy of Otolaryngology鈥擧ead and Neck Surgery FoundationClinical Practice Guideline: Adult Sinusitis UpdateDOI 10.1002/ohn.1344 路 published 2025-07-31 路 accessed 2026-08-20view source
- Centers for Disease Control and PreventionOutpatient Clinical Care for Adults: Antibiotic Prescribing and Useupdated 2024-04-16 路 accessed 2026-08-20view source
continue the learning
From guidance to deliberate practice and evidence
Choose what happens next. iatroX can carry this page's jurisdiction, source-check date and released version into an editable learning record, support your reflection, or let you browse the regional question bank while keeping this topic visible. No action records completion, starts a session or awards CPD/CME credit automatically.
Add this guidance review to CPD/CMEOpen an editable learning-log record with this page鈥檚 provenance attached. You confirm the activity, time, reflection and mappings.Reflect on this with TutorUse optional prompts to consider what you learned and what鈥攊f anything鈥攜ou may change. Suggestions are never inserted automatically.Browse the US question bankKeep this guidance topic in view, then choose your exam and filters. No session starts automatically.
Found a source update or regional discrepancy? Tell the iatroX editorial team.