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    What are the causes of diarrhoea?

    Most diarrhoea episodes tend to pass within a few days, and their cause may never be known. With infectious agents such as bacteria or viruses, the invading germs cause the lining of the intestines to become inflamed. There are several conditions that may increase your risk of chronic diarrhoea (that starts slowly and lasts more than 14 days) such as Crohn's disease, ulcerative colitis, coeliac disease, pancreatitis, cystic fibrosis and irritable bowel syndrome. Hormonal conditions such as an overactive thyroid gland (hyperthyroidism) and diabetes, and various medications including some antibiotics, antacids, anti-HIV and anti-cancer drugs are also known to cause chronic diarrhoea.

    Answered on 07 Apr 2016. Medically reviewed by Health&

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