Persistent or chronic diarrhea can be caused by a variety of factors including infections, food intolerances, chronic diseases, medications, and digestive disorders. Some common causes are:
- Infections from bacteria, viruses, or parasites (e.g., C. difficile, Giardia)
- Food intolerances such as lactose intolerance or fructose intolerance
- Chronic diseases like inflammatory bowel disease (Crohn's disease, ulcerative colitis), irritable bowel syndrome (IBS), and celiac disease
- Side effects of medications including antibiotics and certain cancer treatments
- Digestive tract problems or abnormalities, including after abdominal surgery
- Conditions such as bile acid diarrhea and pancreatic insufficiency
Long-term diarrhea usually means an ongoing problem such as a chronic condition or infection that hasn't fully resolved. It is important to consult a healthcare professional for proper diagnosis and treatment, especially if diarrhea is frequent, urgent, causes weight loss or dehydration, or is accompanied by pain or blood in stools.
