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  1. Chronic sinusitis - Symptoms and causes - Mayo Clinic

  2. Sinus Infection (Sinusitis): Causes, Symptoms & Treatment

  3. Sinus Infection (Sinusitis): Symptoms, Causes, Duration, and

  4. Acute sinusitis - Symptoms and causes - Mayo Clinic

  5. Acute sinusitis - Diagnosis and treatment - Mayo Clinic

  6. Sinus Infection: Symptoms, Causes, and Treatment - Healthline

  7. Sinusitis | Johns Hopkins Medicine

  8. What to do about sinusitis - Harvard Health

  9. Chronic Sinusitis: Symptoms, Causes & Treatment - Cleveland Clinic

  10. Sinusitis: Symptoms, Risk Factors, Treatment, and More - Healthline