inflammation of the mucous membrane that lines the sinuses resulting in symptoms

Sinusitis means infection or inflammation of the sinuses, which are air-filled spaces inside the bones of the face. There are many symptoms, including thick nasal mucus, a plugged nose, and pain in the face.[1]


  1. Rosenfeld R.M. et al 2015. Clinical practice guideline (update): adult sinusitis executive summary". Otolaryngology. 152 (4): 598–609. [1]