deviated septum, broken nose, or growths such as
nasal polyps can make you more susceptible to sinus
infections. Problems with nasal structure can prevent the proper flow of
mucus from the sinuses into the nose.
Other factors that increase your risk for getting sinus infections
include smoking, air pollution, overuse of decongestant sprays, cold weather,
rapid air pressure changes (such as from flying or scuba diving), and swimming
in contaminated water. Also, using
continuous positive airway pressure (CPAP) to treat
sleep apnea may increase the risk of sinusitis.