Viral sinusitis is a viral infection of the sinuses, the hollow spaces in bones around the nose. It is a very common condition. It may follow a cold or flu. The most common symptoms are a blocked nose, and pain or pressure in the region around the nose. Viral sinusitis usually does not need any specific treatment, and typically lasts around 1 week.
Bacterial sinusitis is a bacterial infection of the sinuses that often comes after a viral infection like a cold or the flu. The most common symptoms are a blocked nose and pain. There may be a feeling of pressure around the nose. Anti-inflammatory medications, decongestants, and antibiotics may be used to treat bacterial sinusitis. Many people with bacterial sinusitis recover within 2 weeks and have no further symptoms.
Chronic sinusitis is inflammation of the sinuses that lasts longer than 12 weeks. The condition is mainly caused by bacteria or viruses. The most common symptoms are a blocked nose and pain or pressure around the nose. Diagnosis is based on the symptoms. Chronic sinusitis is often treated with saline nasal sprays and lavages, which are special cleansing liquids. Antibiotics or anti-inflammatory medication may be used in more serious cases. In some cases, surgery may be necessary. Symptoms can persist for some time. However, many people recover with treatment.
More Information about Sinus Infections
Should one go to childcare, school, or work if they have a sinus infection?
Ill individuals should remain home until they do not have a fever, do not develop any new symptoms, and symptoms have been improving for at least 24 hours (48 hours for nausea, vomiting, and/or diarrhea).
Follow the direction of your healthcare provider or occupational health at your workplace.
Note: Exclusion guidelines may differ for healthcare workers.
Contact our Communicable Disease Control (CDC) program at 705-474-1400 or toll free at 1-800-563-2808, ext. 5229, or by email to cdc@healthunit.ca for more information.
Last reviewed: May 2025, by CDC
