Diarrhoea can be caused by a number of things, however the most common cause tends to be food poisoning. This illness is very common in infants and toddlers, especially during Winter and it tends to pass quickly, within 3-4 days. However, it may take at least 7 days for your child’s motions to return to normal, as the good bacteria in their tummies has been disrupted. Probiotics are beneficial during this time and include products such as Inner Health Plus, available in pharmacies. Children may initially be vomiting, and some may even have a runny nose and a sore throat along with diarrhoea.