EVERYDAY HEALTH - Who Is at Risk for IBS? - IBS Center, Nov 30, 2011

"Next to the common cold, irritable bowel syndrome is one of the most common reasons people miss work. One in five people experience symptoms due to IBS, including:
Abdominal pain
Diarrhea
Constipation
Bloating
Cramping
People with IBS have an overly sensitive colon. For some, their colon moves too fast and doesn’t absorb enough fluid before moving the contents out, which causes diarrhea. In other cases, the colon moves too slowly and absorbs too much fluid, causing constipation. People with IBS tend to have either diarrhea or constipation, but some experience both."