What Are the Sinuses and Sinus Headaches?
Sinuses are air-filled cavities (spaces) located in the forehead, cheekbones, and behind the bridge of the nose. The sinuses produce a thin mucus that drains out of the channels of the nose. When a sinus becomes inflamed, often as the result of an allergic reaction, the inflammation will prevent the outflow of mucus and cause a pain similar to that of a headache. See a doctor if you are experiencing sinus headaches to determine the cause.
