Sinusitis is a common condition that sometimes follows a common cold. People who have seasonal allergies or who have structural problems, such as polyps, in the nose or sinuses are also at higher risk. With sinusitis, a virus or bacterial infection causes inflammation of the lining of the sinuses behind the cheekbones and forehead. Sinusitis often improves within two or three weeks and is generally easy to diagnose based on its symptoms.
Sinuses are cavities behind the forehead, nasal bones, cheeks, and eyes. Their main purpose is to warm, moisten, and filter the air we breathe in before it goes to the lungs. Because they're hollow, they also lighten the weight of the head. If the passage connecting the sinuses to the nasal passages becomes plugged, the sinus can no longer drain properly; they accumulate mucus, resulting in a feeling of heaviness in the face and pain from increased pressure on the nerves. The facial pain and pressure may worsen when bending over.
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