Irritable Bowel Syndrome with Diarrhea (IBS-D) is a subtype of Irritable Bowel Syndrome characterized primarily by chronic, recurrent diarrhea. It falls under the broader category of functional gastrointestinal disorders, where symptoms arise without identifiable structural or biochemical abnormalities. The exact cause of IBS-D is not well understood, but it is believed to be multifactorial, involving gut-brain axis dysregulation, motility issues, and hypersensitivity.
