You're coughing and sneezing and tired and achy. You think that you might be getting a cold. Later, when the medicines you've been taking to relieve the symptoms of the common cold are not working and you've now got a terrible headache, you finally drag yourself to the doctor. After listening to your history of symptoms, examining your face and forehead, and perhaps doing a sinus X-ray, the doctor says you have sinusitis.
Sinusitis simply means your sinuses are infected or inflamed, but this gives little indication of the misery and pain this condition can cause. Health care experts usually divide sinusitis cases into:
- Acute, which last for three weeks or less
- Chronic, which usually last for three to eight weeks but can continue for months or even years
- Recurrent, which are several acute attacks within a year
Health care experts estimate that 37 million Americans are affected by sinusitis every year. Health care providers report nearly 32 million cases of chronic sinusitis to the Centers for Disease Control and Prevention annually. Americans spend millions of dollars each year for medications that promise relief from their sinus symptoms.
What Are Sinuses?
Sinuses are hollow air spaces in the human body. When people say, "I'm having a sinus attack," they usually are referring to symptoms in one or more of four pairs of cavities, or sinuses, known as paranasal sinuses. These cavities, located within the skull or bones of the head surrounding the nose, include:
- Frontal sinuses over the eyes in the brow area
- Maxillary sinuses inside each cheekbone
- Ethmoid sinuses just behind the bridge of the nose and between the eyes
- Sphenoid sinuses behind the ethmoids in the upper region of the nose and behind the eyes
Each sinus has an opening into the nose for the free exchange of air and mucus, and each is joined with the nasal passages by a continuous mucous membrane lining. Therefore, anything that causes a swelling in the nose — an infection, an allergic reaction, or another type of immune reaction — also can affect the sinuses. Air trapped within a blocked sinus, along with pus or other secretions, may cause pressure on the sinus wall. The result is the sometimes intense pain of a sinus attack. Similarly, when air is prevented from entering a paranasal sinus by a swollen membrane at the opening, a vacuum can be created that also causes pain.
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