What is sinusitis?

Sinusitis (also called "rhinosinusitis") is an inflammation of the sinus membranes that can be infectious (caused by a virus or bacteria) or non-infectious (often caused by allergies). Sinusitis is a swelling of the inner lining of the sinuses.

 

The sinuses are the spaces between the bones in the face where air passes and where a fluid called mucus drains into the nose. In sinusitis, the swelling blocks the openings in the sinuses through which mucus drains into the nose.

When mucus cannot drain properly, the pressure of the blocked fluid inside the sinuses can be painful. Sinusitis is quite common. It feels much like a head cold, with a stuffy or runny nose and a headache.

For most people, sinusitis is a temporary condition that goes away with simple treatment. If the symptoms do not clear up easily, medication can help. In rare cases, surgery may bring permanent relief.