Sinusitis or rhinosinusitis, is inflammation of the mucous membrane that lines the paranasal sinuses within your nose. Tens of millions of people suffer from or develop sinusitis each year.
Sinusitis can result from infection, allergy, or cold. Symptoms include drainage from the nose or down the back of the throat, nasal congestion, tenderness and swelling around the nose, eyes, cheeks, and forehead, and/or a reduced sense of smell and taste.
The type of sinusitis may depend on the severity and duration of the symptoms. For example, four or more episodes of acute sinusitis per year may be similar to chronic sinusitis.
Acute – less than 4 weeks; Subacute – 4-12 weeks; Chronic – more than 12 weeks