Ethmoid sinusitis is the inflammation of a specific group of sinuses — the ethmoid sinuses — which sit between the nose and eyes. The ethmoid sinuses are hollow spaces in the bones around the nose.

Medically reviewed by Lissette Pichardo, MDMedically reviewed by Lissette Pichardo, MD The ethmoid bone is a cube-shaped bone located in the center of the skull between the eyes. It helps form the ...