Welcome to the forum. You'll find plenty of info here, and lots of helpful people.
IBS is a "syndrom" which, simply put, means its a number of symptoms that the doctor can't specificly identify the cause of. Diet and stress are high on the list. You probably already know about the episodes of pain, cramping, bloating, constipation or diarhea, (or a combination of both).
At 27, unless you have been eating absolutely horribly for years, or live in an incredibly stressful environment, I would bet you could resolve your "syndrom" over time, through simple dietary or life style changes. This forum is full of suggestions. And if none of the sugggestions work for you, just ask new questions.
I am 48 and suffered with IBS for about 30 years. I have now put it behind me, mostly by what I eat and finding ways to decrease stress. I have a number of issues that will be with me for some time because I took so long to get serious about resolving my IBS. So I would encourage you to not panic about the diagnosis, but certainly take some time to learn about your body and specificially about digestion to minimize further damage.
There are certainly drugs that doctors will offer. Try them if you like, but ask what they do and what side-effects they cause. Remember Irritable Bowl "Syndrom" means they don't know exactly what is causing the problem, so at least, to some degree, they are guessing at what to prescribe. Some medicines can increase the problem over time. The reality is some so-called healthy foods can also increase IBS symptoms. So explore what "healthy" means for your body.
Granola is healthy, right? Not for me, too coarse and hard for my system to digest. Pomegranate juice, with all it healthy anti-oxidants? Cramps me up like a twisted wash rag. But I enjoy plenty of good food.
This is just a starting point, as they say, don't get scared, get curious, and you'll find a way out of this.
Good luck and good health to you.
Post Edited (redee2moov) : 3/23/2009 4:55:15 PM (GMT-6)