Sinuses are air-filled spaces behind the bones of the upper face: between the eyes and behind the forehead, nose and cheeks. The lining of the sinuses are made up of cells with tiny hairs on their surfaces called cilia. Other cells in the lining produce mucus. The mucus traps germs and pollutants and the cilia push the mucus out through narrow sinus openings into the nose.
When the sinuses become inflamed or infected, the mucus thickens and clogs the openings to one or more sinuses....
Read moreSource: ADAM Encyclopedia
ReferencesAhovuo-Saloranta A, Borisenko OV, Kovanen N, Varonen H, Rautakorpi UM, Williams JW Jr, et al. Antibiotics for acute maxillary sinusitis.... Read more »
Source: HealthCentral Encyclopedia
Sinusitis is an inflammation of the nasal sinuses. It is usually caused by infection (bacterial or viral), but can also be caused by allergic... Read more »
Source: ADAM Encyclopedia
Bacterial sinusitis is nearly always harmless (although uncomfortable and sometimes even very painful). If an episode becomes severe, antibiotics... Read more »
Source: Harvard Decision Guide
What Is It? Chronic sinusitis is a long-term inflammation of the sinuses. The sinuses are moist air spaces behind the bones of the upper face -... Read more »
Source: ADAM Encyclopedia
Bulging eyeballs Cannot move the eye in a particular direction Drooping eyelids Headaches Vision loss Signs and tests ... Read more »