Sinusitis is one of the most common and debilitating health problems in the U.S. Each year, more than 37 million Americans suffer from sinusitis in which the nasal and sinus membranes become swollen and congested. This may block the inner tube leading to the ear, resulting in a feeling of blockage in the ear or fluid behind the eardrum. It can also cause breathing through the mouth. Symptoms can typically include nasal congestion, thick yellow-green nasal discharge, facial pain, and pressure. Having a complete evaluation by an ear, nose and throat specialist is paramount to determine the cause of your symptoms and receive the appropriate treatment, whether medications, procedures, or surgery.