Sinusitis is an infection of the paranasal sinuses in which the mucous of the sinuses (sinus) becomes inflamed. This frequent inflammation may be acute or chronic. In most cases, the cause of the inflammation is virus or bacteria. Sinusitis may be associated with hereditary factors.
Sinusitis may arise in isolation or be associated with signs and symptoms of a general respiratory disease. The typical symptoms of sinusitis are headache and facial pain, as well as a greenish-yellow nasal discharge. Diagnosis can be easily made based on these discomforts. A physical examination and complementary tests such as X-ray images help complete the diagnosis.