Acute Rhinosinusitis in Adults: Urgent Care Evaluation and Treatment
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Evidence-Based Urgent Care • November 2026 • Volume 5 • Issue 11
Evidence-Based Evaluation and Treatment of Acute Rhinosinusitis in Adults

Evidence-Based Evaluation and Treatment of Acute Rhinosinusitis in Adults

Infectious Disease CME • Pharmacology CME • Risk Management CME

What Urgent Care Clinicians Need to Know

Respiratory complaints account for a substantial share of urgent care visits, and acute rhinosinusitis affects approximately 12% of US adults each year. Most cases are viral and self-limited, yet expectations shaped by previous prescriptions can complicate urgent care management. Critical decision-making centers on distinguishing uncomplicated illness from bacterial disease and potentially serious complications.

This issue reviews common pitfalls in diagnosis, antibiotic and corticosteroid prescribing, and interpretation of respiratory testing. It also addresses patient communication, watchful waiting, medication safety, and presentations affected by immunosuppression or a dental source. Pediatric and coding supplements extend the discussion to childhood presentations and documentation of clinical decisions.

Why This Topic Matters in Urgent Care

  • Sinus symptoms are common, but most episodes do not represent bacterial disease.
  • Patient expectations and prior treatment experiences can contribute to unnecessary prescriptions.
  • Complications and immunocompromised presentations carry greater risk and can challenge routine outpatient assessment.
  • Clear communication and follow-up planning support patient satisfaction and responsible antibiotic use.

Clinical Content at a Glance

Clinical Q&A
Why is distinguishing viral from bacterial rhinosinusitis challenging?
Nasal and sinus symptoms overlap across several conditions. The issue reviews how the illness course and clinical context inform that distinction.
How does watchful waiting fit into urgent care management?
Watchful waiting and delayed prescribing are reviewed as approaches to selected uncomplicated presentations. The discussion includes patient preferences, communication, and follow-up considerations.
What does the issue cover about antibiotics and symptom relief?
The review addresses antibiotic selection alongside commonly used prescription, over-the-counter, and home treatments. It emphasizes the balance between expected benefit, medication risks, and stewardship.
Which presentations raise concern beyond routine rhinosinusitis?
The issue examines orbital and intracranial complications, immunocompromised patients, and odontogenic disease. These presentations can involve different risks, care needs, and warrant higher level of evaluation.
Can respiratory testing simplify sinusitis decisions?
The review discusses potential roles and limitations of point-of-care biomarkers and multiplex respiratory tests. It also explores why test results must be interpreted within the clinical context.
Why is distinguishing viral from bacterial rhinosinusitis challenging?
Nasal and sinus symptoms overlap across several conditions. The issue reviews how the illness course and clinical context inform that distinction.
Case Snapshots

CASE 1 — Familiar Sinus Symptoms and Treatment Expectations: A healthy 45-year-old woman presents with several days of sore throat, rhinorrhea, congestion, and cough, describing a pattern previously treated with azithromycin and a steroid pack. The case explores how prior prescribing shapes expectations and how clinicians discuss the current illness and treatment options.

CASE 2 — Worsening After Initial Improvement: A healthy 35-year-old man reports a prolonged cold that briefly improved before worsening with increasing facial pain and pressure. The case highlights the importance of illness trajectory when weighing viral and bacterial explanations and management choices.

CASE 3 — Severe Unilateral Symptoms in a Medically Complex Patient: A 73-year-old woman with diabetes and adalimumab use presents acutely ill with fever, unilateral cheek pain, facial redness, and swelling. The case focuses on recognizing when patient risk and examination findings challenge the assumption of routine outpatient sinusitis care.

  • CASE 1 — Familiar Sinus Symptoms and Treatment Expectations
  • CASE 2 — Worsening After Initial Improvement
  • CASE 3 — Severe Unilateral Symptoms in a Medically Complex Patient
Clinical Tools
  • An anatomical illustration of sinus infection and a summary of causes of acute sinus symptoms.
  • A reference describing rhinosinusitis timing and illness patterns, plus a summary of risk factors for bacterial disease.
  • Antibiotic selection covering factors favoring broader coverage, shorter treatment options, and allergy considerations.
  • Communication strategies for discussing symptom relief, antibiotic expectations, and delayed prescribing with patients.
  • Pediatric references covering presentation patterns, pathogens, and antibiotic treatment considerations.
  • Clinical pathways for urgent care evaluation and management of adult and pediatric rhinosinusitis.
  • A coding case and medical decision-making reference illustrating documentation and evaluation and management service selection.
  • An anatomical illustration of sinus infection and a summary of causes of acute sinus symptoms.
  • A reference describing rhinosinusitis timing and illness patterns, plus a summary of risk factors for bacterial disease.
Risk Management Pitfalls
  • Repeating previous antibiotic prescriptions without reassessing the current illness.
  • Using systemic corticosteroids routinely for sinus symptoms.
  • Overlooking a suppurative complication after a positive viral test.
  • Missing immunosuppressive medications in the treatment history.
  • Assuming a negative multiplex respiratory panel establishes bacterial disease.
  • Repeating previous antibiotic prescriptions without reassessing the current illness.
  • Using systemic corticosteroids routinely for sinus symptoms.
Key References

Following are the most informative references cited in this paper, as determined by the authors.

1. * Rosenfeld RM. Acute sinusitis in adults. N Engl J Med. 2016;375(10):962-970. (Review) DOI: 10.1056/NEJMcp1601749

2. * Payne SC, McKenna M, Buckley J, et al. Clinical practice guideline: adult sinusitis update. Otolaryngol Head Neck Surg. 2025;173(Suppl 1):S1-S56. (Practice guideline) DOI: 10.1002/ohn.1344

3. * Chow AW, Benninger MS, Brook I, et al. IDSA clinical practice guideline for acute bacterial rhinosinusitis in children and adults. Clin Infect Dis. 2012;54(8):e72-e112. (Practice guideline) DOI: 10.1093/cid/cir1043

7. * Savage TJ, Butler AM, Kronman MP, et al. Amoxicillin-clavulanate vs amoxicillin for acute sinusitis in adults. JAMA. 2026;335(19):1694-1705. (Retrospective cohort study; 521,244 patients) DOI: 10.1001/jama.2025.26902

28. * Harris AM, Hicks LA, Qaseem A, et al. Appropriate antibiotic use for acute respiratory tract infection in adults: advice for high-value care from the American College of Physicians and the Centers for Disease Control and Prevention. Ann Intern Med. 2016;164(6):425-434. (Practice guideline) DOI: 10.7326/M15-1840

33. * Spurling GK, Del Mar CB, Dooley L, et al. Delayed antibiotic prescriptions for respiratory infections. Cochrane Database Syst Rev. 2017;2017(9):CD004417. (Cochrane review; 11 studies, 3555 patients) DOI: 10.1002/14651858.CD004417.pub5

1. * Rosenfeld RM. Acute sinusitis in adults. N Engl J Med. 2016;375(10):962-970. (Review) DOI: 10.1056/NEJMcp1601749

2. * Payne SC, McKenna M, Buckley J, et al. Clinical practice guideline: adult sinusitis update. Otolaryngol Head Neck Surg. 2025;173(Suppl 1):S1-S56. (Practice guideline) DOI: 10.1002/ohn.1344

CME Information

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