Digestion Myths & Ostomy Misconceptions Myth: Diarrhoea is a sign of an infection and you should just let it run its course Diarrhoea affects most people from time to time and has many different causes, including viruses, bacteria picked up from contaminated food, anxiety, food allergies and long term conditions like irritable bowel syndrome (IBS). Whatever the cause, it is recommend to treat it early. Diarrhoea removes fluids and salts from the…