Chronic Sinusitis

Chronic sinusitis refers to inflammation of the sinuses that continues for at least 3 weeks, but often continues for months or even years.

As noted above, allergies are frequently associated with chronic sinusitis. Patients with asthma have a particularly high frequency of chronic sinusitis. Inhalation of airborne allergens (substances that provoke an allergic reaction), such as dust, mold, and pollen, often set off allergic reactions (allergic rhinitis) that, in turn, may contribute to sinusitis. People who are allergic to fungi can develop a condition called "allergic fungal sinusitis."

Damp weather, especially in northern temperate climates, or pollutants in the air and in buildings also can affect people subject to chronic sinusitis.

Like acute sinusitis, chronic sinusitis is more common in patients with immune deficiency or abnormalities of mucus secretion or movement (e.g., immune deficiency, HIV infection, cystic fibrosis, Kartagener's syndrome). In addition, some patients have severe asthma, nasal polyps, and severe asthmatic responses to aspirin and aspirin-like medications (so-called non-steroidal anti-inflammatory drugs, or NSAIDs). These latter patients have a high frequency of chronic sinusitis.

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Sources:NIAIDNational Institutes of Health

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