Sinusitis is characterized by inflammation of the lining of the paranasal sinuses. Acute sinusitis is a temporary infection of the sinuses often associated with a cold. Chronic sinusitis occurs when the spaces inside your nose and head (sinuses) are swollen and inflamed for three months or longer, despite treatment.

Acute sinusitis symptoms often include:

• Nasal blockage or congestion, causing difficulty breathing through your nose
• Thick, yellow or greenish discharge from the nose or down the back of the throat (postnasal drainage)
• Pain, tenderness, swelling and pressure around your eyes, cheeks, nose or forehead that worsens when bending over