Updated: 8 May 2020 Irritable Bowel Syndrome (IBS) may cause much discomfort in the large intestine. But it is not considered a serious health risk. It also does not cause more serious diseases such as intestinal bleeding, inflammatory bowel disease or cancer. IBS can also irritate, aggravate and inflame hemorrhoids which is a separate medical condition. What causes IBS? No one knows for sure. There is not one identifiable organic factor. However clinical studies and (more…)