Health care experts usually divide sinus
itis cases into Acute, which lasts for
3 weeks or less Chronic, which usually lasts for
3 to 8 weeks but can continue for
months or even years Recurrent, which is several acute attacks within a year Health care experts estimate that 37 million Americans are affected by sinus
itis every year. Health care workers report 33 million cases of chronic sinus
itis to the U.S. Centers for Disease Control and Prevention annually.