What is irritable bowel syndrome (IBS)?
Irritable bowel syndrome (IBS) is a “syndrome,” meaning a group of symptoms. The most common symptoms of IBS are abdominal pain or discomfort often reported as cramping, bloating, gas, diarrhea, and/or constipation. IBS affects the colon, or large bowel, which is the part of the digestive tract that stores stool.

IBS is not a disease. It’s a functional disorder, meaning that the bowel doesn’t work, or function, correctly.

What causes IBS?
Doctors are not sure what causes IBS. The nerves and muscles in the bowel appear to be extra sensitive in people with IBS. Muscles may contract too much when you eat. These contractions can cause cramping and diarrhea during or shortly after a meal. Or the nerves may react when the bowel stretches, causing cramping or pain.

IBS can be painful. But it does not damage the colon or other parts of the digestive system. IBS does not lead to other health problems.
http://thechive.files.wordpress.com/2013/01/19.gifw=300&h=159What are the symptoms of IBS?
The main symptoms of IBS are
- abdominal pain or discomfort in the abdomen, often relieved by or associated with a bowel movement
- chronic diarrhea, constipation, or a combination of both

Other symptoms are
- whitish mucus in the stool
- a swollen or bloated abdomen
- the feeling that you have not finished a bowel movement
http://blaria.files.wordpress.com/2012/12/bill-cosby-hot-dog.gifw=490Women with IBS often have more symptoms during their menstrual periods