Sinus Infection 11 Symptoms And Treatments See full list on mayoclinic. org. Sinusitis is an inflammation or swelling of the tissue lining the sinuses. healthy sinuses are filled with air. but when they become blocked and filled with fluid, germs can grow and cause an. See full list on mayoclinic. org. Otolaryngology In Critical Care Annals Of The American Thoracic Sinus infections, or sinusitis, occur when a virus of bacteria enters the sinuses. the symptoms of sinusitis are similar to a cold, but it also involves a feeling of pressure and congestion in the. Take these steps to reduce your risk of getting chronic sinusitis: 1. avoid upper respiratory infections. minimize contact with people who have colds. wash your hands frequently with soap and water, especially before meals. dua. manage your allergies. work with your doctor to keep symptoms under control. avoid exposure to things you're allergic to whenever possible. 3. avoid cigarette smoke and polluted air. tobacco smok...