Diarrhoea occurs when too much water is retained in the bowel or secreted back into the bowel, making the stool too watery.

The main cause of short-term diarrhoea is:

  • A stomach ‘bug’ caused by a virus, parasite or bacteria. This is also known as gastroenteritis and the infection can be caught by:

  • Drinking unclean water

  • Food poisoning

  • Poor hygiene and sanitation, such as from someone who did not wash their hands after using the toilet, or before and after preparing food

Other causes of short-term diarrhoea are:

  • Change in diet

  • Certain foods or food ingredients

  • Too much alcohol

  • Stress