oa SA Pharmacist's Assistant - Sinusitis : ear, nose and throat
Sinusitis is an inflammation of the tissue that lines the sinuses. The sinuses are small, air-filled cavities situated behind the cheekbones and forehead which open up into the cavity of the nose, and help to control the temperature and water content of the air reaching the lungs. The sinuses have a thin lining that normally produces a small amount of mucus. Usually, the mucus that is produced naturally by the sinuses drains into the nose through small channels. When the sinus openings become blocked or too much mucus builds up, viruses, bacteria or fungi can grow more easily and cause infection. When the tissue lining of the sinuses gets infected, it swells and produces extra mucus.
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