Acute Sinusitis - Harvard Health

What is acute sinusitis? Sinuses are air-filled spaces behind the bones of the upper face: between the eyes and behind the forehead, nose and cheeks. The lining of the sinuses are made up of cells with tiny hairs on their surfaces called cilia.  Other cells in the lining produce mucus.

What to do about sinusitis - Harvard Health

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What to do about sinusitis - Harvard Health