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Sinusitis is usually divided in three categories by physicians:
Acute Sinusitis — usually lasts for 3 weeks, or less
Chronic — lasting longer than 6 weeks, but can continue for months or even years
Recurrent — refers to having several acute attacks within a year
Health care experts estimate that 37 million Americans are affected by sinusitis every year. In addition, health care workers report 33 million cases of chronic sinusitis to the US Centers of Disease Control and Prevention every year. Furthermore, Americans spend billions of dollars each year for medications, either over the counter or prescription that promise relief from their sinus symptoms.
Let us attempt to demystify the often misunderstood topic of sinus congestion, sinus headaches and sinusitis.
The Sinuses are air cavities in the human body, in this case the skull. The cavities next to the nose are called paranasal sinuses and are the ones that bother most people, when they say they suffer from sinus congestion and pressure.
There are four different paranasal sinuses:
Each sinus has an opening, called an ostium, into the nose which serves to exchange air and mucus produced. The opening is joined to nasal passages by a continuous mucous membrane. Anything that causes a swelling in the nose such as an infection or an allergic reaction, can affect the sinuses. When air gets trapped within a blocked sinus, along with pus or other secretions, it can cause pressure on the sinus wall. Also, if air is prevented from entering a paranasal sinus by a swollen membrane at the ostium, a vacuum can be created which also causes discomfort.