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
months or even years Recurrent, which is several acute attacks within a year Health care experts estimate that 37 million American
s 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.