Your stomach has been feeling crummy for a while now. That pain and cramping comes and goes, but even after a few months, you just can't shake it. You've heard of something called IBS -- or irritable bowel syndrome. Could it be what you've got? And how will your doctor find out?
There are some tests that help figure out what's going on, including a new blood test. But the most common way your doctor makes a diagnosis is with a bit of detective work.