What is a sinus? A sinus is an empty, air-filled cavity. For the reasons of this article, a sinus will referred to those hollow cavities that are in the skull and connected to the nasal airway by a narrow hole in the bone (ostium). Normally all are open to the nasal airway through an ostium. Humans have four pair of these cavities each referred to as the:
1. Frontal sinus (in forehead), 2. Maxillary sinus (behind cheeks), 3. ethmoid sinus (between the eyes), and 4. Sphenoid sinus (deep behind the ethmoids).
Ever gets a sinus infection subsequent a bad cold? It's called sinusitis. After a cold, you are at greater risk of developing a sinus illness because a cold causes inflammation and swelling of the sinuses. While sinusitis and cold symptoms can make you miserable, they are common problems and affect millions of Americans each day. Here's up-to-date information you should have about sinusitis and colds.
What Is a Sinus Infection?
A sinus infection is soreness or swelling of your sinuses. Normally, your sinuses are filled with air. When the sinuses become blocked and filled with fluid, bacteria can grow there and cause infection. This infection is sinusitis.
What Are the Symptoms of a Sinus Infection?
Symptoms of a sinus infection include the following:
* Thick, yellow, foul-smelling nasal discharge * Pressure or pain around the face and eyes * Headache (generally in the forehead area) * Nasal obstruction * Congestion * Post-nasal drip * A cold that won't go away * Fever or cough that may or may not be present
Keep in mind that these symptoms can also be seen with a cold. But if the pain around your face and eyes and the thick nasal discharge continue for more than a week, you may have sinusitis.
Source:
http://www.medicinenet.com
http://www.webmd.com/
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