Irritable bowel syndrome, also known as IBS, is a common disorder that affects the colon, (aka large intestine). The condition causes a number of embarrassing and uncomfortable symptoms such as gas, constipation, cramping, abdominal pain, bloating, and diarrhea. Most people who are at risk for Irritable bowel syndrome usually begin to experience signs and symptoms before age 35. Women are more likely to suffer from irritable bowel syndrome than men are. Some people may only experience irritable bowel syndrome a few times in their life. However, some people may suffer from it for many years. It is estimated that about one in every five people in the United States suffers from has symptoms of irritable bowel syndrome.