The sinuses are air-filled cavities located behind the forehead, nose and cheeks. Many people suffer from chronic sinus pain or pressure, as well as recurrent sinus infections. In some cases, this is due in part to bacterial biofilms formed in the nose. In others, there is an anatomic obstruction at the opening of the sinuses that block the sinuses from filling with air or draining appropriately. Medical or surgical therapy may be indicated to improve the functioning of the sinuses. Surgery to open the sinus pathways is a day surgery procedure performed in the Operating Suite with minimal downtime. The surgery is performed through the nose with small cameras called endoscopes. Sometimes, small balloons are inflated to open up the sinus openings.