Sinusitis: What causes it?

Whether you have just a couple of horribly painful episodes a year or seem to always have a clogged head, you've probably wondered what is causing your sinusitis. There are actually two types of this condition, and each has different causes.

Here's the low-down on what's making you miserable:

http://www.associatedcontent.com/article/1108428/causes_of_acute_and_chronic_sinusitis.html?page=2&cat=70