The bowel or colon that’s affected in Irritable Bowel Syndrome or IBS is the large intestine, although challenges in the small intestine such as Small Intestinal Bacterial Overgrowth (SIBO) can aggravate IBS symptoms.
How Does our Digestion Affect IBS?
Digestion is a complex combination of movements and organs. So when looking at our bowel in relation to IBS, it’s important to look at the entire digestive system and not just the large intestine. For example, eating too fast can result in gulping down air which can increase bloating and abdominal distension.
The video is a great introduction to how your bowel works