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(HealthDay News) - Sinusitis, an inflammation of the sinuses, can lead to a sinus infection.

Knowing what triggers your sinusitis can help you prevent -- or at least prepare -- for the problem. The U.S. National Library of Medicine lists these factors that can cause sinus problems:

• Exposure to air pollution or cigarette smoke.
• Diving or swimming.
• Excessive use of nasal decongestants.
• Exposure to an allergen or another foreign substance that enters the nasal passages.
• Undergoing an abrupt change in altitude, such as when flying.
• Having certain medical conditions, including GERD, pregnancy and asthma.
• Having dental work or suffering a head injury.