Sinusitis.. Inflammation of the lining of the sinus cavities in the cheeks and around the eyes

Sinusitis is inflammation of the lining of the sinus cavities.
Sinus is empty cavities in the cheeks and around the eyes. Sinusitis usually comes after a cold and causes pain and pressure in the head and face.
Sinusitis can be severe (sudden) or chronic (long-term).
In chronic cases, inflammation does not completely disappear for 8 weeks or more.