Sinusitis is a disease characterized by inflammation of the sinuses, a cavity located behind the forehead, cheeks and eyes. This condition may be caused by an infection (viral or bacterial ) or a fungus and can be divided into acute sinusitis or chronic sinusitis. The symptoms in both cases are the same: pain or pressure in the head, sore throat, congestion and runny nose, loss of smell, fever, malaise, cough and bad breath. The difference is that in acute sinusitis a maximum symptomatology manifests four weeks, while chronic symptoms can last more than three months. Usually sinusitis is cured by itself, but may be given antibiotics. Sometimes, the patient may require surgery if the symptoms do not go away with treatment.