The paranasal sinuses are four pairs of cavities located within the bones of the facial massif; they communicate via bony canals and orifices with the nasal cavities, which in turn can communicate with the outside.
Sinusitis is the inflammation of the sinuses, usually caused by an infectious agent, such as fungus, virus or bacteria.
The association of nasal inflammation and sinusitis is common, and we speak in this case of rhinosinusitis.
Sinusitis can be acute or chronic. In very general terms, these types are defined by the length of time the symptoms persist, but there are other differences in terms of symptoms, causes, and treatments.
