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Sinus Headache (cont.)

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What is a sinus headache?

If the lining of the ducts or tubes that connect the sinuses to the back of the nose becomes inflamed, the sinuses may not be able to drain normally, and pressure may build up within the blocked sinus. There may also be associated swelling and inflammation of the lining of the sinuses, resulting in increased mucus and fluid secretion. This increase in fluid and pressure causes the pain of a sinus headache. The term sinusitis is used to describe inflammation of the sinus (sinus + itis = inflammation).

What causes a sinus headache?

While a sinus inflammation (sinusitis) may be caused by a viral infection, much like a cold that causes swelling in the nose, the inflammation and decreased ability of the sinuses to drain may also be caused by an allergic reaction like hay fever. Inflammation, like anywhere else in the body, causes swelling and increased fluid production. In the sinuses, this decreases the ability of the sinuses to drain. The increased inflammatory fluid production (just like the weeping observed with a skin injury) combines with the decrease in drainage to cause the pain and pressure of a sinus headache.

Nature does not like stagnant fluid, and after a period of time, bacteria and viruses may travel from the nasal cavities into the stagnant fluid within the sinus cavity and cause an infection. Less commonly, fungal infections may cause a sinus infection, and even more rarely, tumors can invade the sinus.

The maxillary sinus sits underneath the eye within the cheekbone. The upper teeth attach to the lower portion of this bone, and dental infections can travel up the root of the tooth and infect the sinus directly.

Medically Reviewed by a Doctor on 1/28/2014

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Source: MedicineNet.com
http://www.medicinenet.com/sinus_headache/article.htm

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