The size and shape of the frontal sinus can vary from person to person these spaces fill up with mucus which then drain into the nose the draining process can be hindered by blockages. Your frontal sinuses are a pair of small air filled cavities located just behind your eyes in the brow region along with three other pairs of paranasal sinuses these cavities produce a thin . Frontal sinus location the frontal sinuses are located within the lamina of the frontal bone these can be found behind the superciliary arches between the bones of the skull and face picture 1 frontal sinus frontal sinus description frontal sinuses are membranous and are lined by mucosa their shape and size vary among individuals
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