sinusitis is infection or inflammation of the lining of the sinus cavities. these are hollow spaces in your cheeks and around your eyes. sinus infections often follow a cold and cause pain and pressure in your head and face. sinusitis can be either acute (sudden) or chronic (long-term). with chronic sinusitis the infection or inflammation does not completely go away for 8 weeks or more. webmd medical reference from healthwise this information is not intended to replace the advice of a doctor. healthwise disclaims any liability for the decisions you make based on this information. © 1995-2011 healthwise incorporated. healthwise healthwise for every health decision and the healthwise logo are trademarks of healthwise incorporated.
what is sinusitis?