The paranasal sinuses are within the bones of the face and head. Six paired sinuses are present in humans, and although their exact function is a topic for debate, they appear to play several roles ranging from cushioning the brain during trauma to increasing resonance of the voice and releasing nitric oxide to help with lung physiology. The sinuses are lined with a layer of respiratory epithelium that normally secretes a small amount of mucus to keep the sinuses lubricated and contains cilia to help sweep away debris. Rhinosinusitis occurs when this lining gets infected or irritated which can lead to excessive mucus production and impaired mucus drainage. It is a very prevalent condition affecting up to 16% of the population and is the fifth most common diagnosis generating an antibiotic prescription1,2.