This last weekend I was visiting South Carolina (I hail happily from California) and had an unexpected flare-up. It was odd because typically my first hint of problems is coughing up a storm.  I was speaking to a group of people and every time I went to talk found myself really breathless.  My first reaction was to ask what the altitude was - it felt like when I've visited really high places like Flagstaff.  Once I figured out what was actually going on the rescue inhaler worked pretty well.

Problem is I have no idea what triggered the problem and am concerned since I will be visiting this area again later this year.  There wasn't anything obvious...cig smoke, blooming plants or trees, but then again I don't know the southern US at all.  Thoughts and suggestions welcome because it really freaked me out.