What Causes Chronic Diarrhea in Adults?

Chronic diarrhea in adults has multiple potential causes, from infections to chronic diseases. Irritable bowel syndrome affects 10-15% of adults and commonly causes chronic diarrhea along with abdominal pain. Inflammatory bowel diseases like Crohn's disease and ulcerative colitis create persistent inflammation leading to frequent loose stools. Food intolerances, particularly lactose intolerance affecting 65% of adults worldwide, can trigger chronic digestive symptoms. Medications including antibiotics, antacids, and blood pressure medications frequently cause diarrhea as a side effect. Infections from parasites, bacteria, or viruses may persist for weeks or months. Other causes include celiac disease, hyperthyroidism, diabetes complications, and malabsorption disorders. If you experience diarrhea lasting more than four weeks, consult a healthcare provider for proper evaluation and treatment.

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