Your sinuses are air-filled spaces inside the bones of your face and skull, clustered around your nose and eyes.

Main sinus locations

  • Frontal sinuses : In your forehead, just above your eyebrows, roughly behind the center of your forehead on each side.
  • Maxillary sinuses : In your cheeks, behind your cheekbones on either side of your nose; these are the largest sinuses.
  • Ethmoid sinuses : A group of small air cells between your eyes, right behind and between the bridge of your nose and the inner corners of your eyes.
  • Sphenoid sinuses : Deeper in your head, behind your nose and between/behind the eyes, in the center of the skull.

How to picture them

  • Imagine a hollow ring of small caves around your nose: in the forehead (frontal), in the cheeks (maxillary), between the eyes (ethmoid), and deep behind the nose (sphenoid).
  • These spaces are lined with mucus-producing tissue and connect to your nasal cavity, which is why sinus infections cause pressure in your forehead, cheeks, and around the eyes.

Information gathered from public forums or data available on the internet and portrayed here.