Drug-induced diarrhea: Laxatives and other drugs, including antibiotics, can trigger diarrhea.Various bacteria and parasites can also be the cause.

Chronic infections: A history of travel or antibiotic use can be clues in chronic diarrhea.Malabsorptive and maldigestive diarrhea: The first is due to impaired nutrient absorption, and the second is due to impaired digestive function.It develops due to inflammation and occurs often during the night. Microscopic colitis: This is a persistent type of diarrhea that usually affects older adults.Some other major causes of chronic diarrhea include: Both conditions can also cause blood in the stool. IBD describes either ulcerative colitis or Crohn’s disease. Inflammatory bowel disease (IBD) is another cause of chronic diarrhea. IBS causes many symptoms, including cramping, abdominal pain, and altered bowel habits, which can include diarrhea, constipation, or both. In the developed world, irritable bowel syndrome (IBS) is the most common cause of functional diarrhea. Some cases of chronic diarrhea are called “functional” because although all the digestive organs appear normal, they are not functioning as they ideally should. The most commonly identified causes of acute diarrhea in the United States are the bacteria Salmonella, Campylobacter, Shigella, and Escherichia coli. The microbes responsible for this infection include: Many cases of diarrhea are due to an infection in the gastrointestinal tract.

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