• Other irritants can inflame the nasal passages, such as air pollution, cigarette smoke, cigar smoke, and perfumes made from synthetic ingredients
. Once again, see your doctor, or avoid the irritants.
• Asthma is an immune disease, and asthma sufferers are highly susceptible to sinusitis. About 3 out of 4 people with asthma also have chronic sinusitis. There is evidence that some asthma and the chronic sinusitis associated with it is caused by Chlamydia or mycoplasma bacteria.