Visceral Sensitivity in IBD (Irritable Bowel Disease) and IBS (Irritable Bowel Syndrome)

This trial is studying how sensitive the gut is to pain and discomfort in people with irritable bowel syndrome (IBS), inflammatory bowel disease (such as Crohn's disease or ulcerative colitis), or in people with no gut problems at all. You may be eligible if: you have been diagnosed with IBS, active ulcerative colitis, ulcerative colitis in remission, active Crohn's disease, or Crohn's disease in remission — or if you are a healthy person with no stomach pain; and you are willing to stop certain gut medications at least 24 hours before the study visit. You may NOT be eligible if: you have a serious kidney or liver disease, thyroid problems, or clotting issues; or you have had abdominal surgery (other than a simple, uncomplicated appendix removal). Talk to your doctor to see if this trial is right for you.