Diarrhoea and Vomiting

Diarrhoea and Vomiting (Gastroenteritis) is a very common condition that causes diarrhoea and vomiting. It’s usually caused by a bacterial or viral tummy bug.

It affects people of all ages, but is particularly common in young children.

Most cases in children are caused by a virus called rotavirus. Cases in adults are usually caused by norovirus (the “winter vomiting bug”) or bacterial food poisoning. Gastroenteritis can be very unpleasant, but it usually clears up by itself within a week. You can normally look after yourself or your child at home until you’re feeling better.

Try to avoid going to your GP, as gastroenteritis can spread to others very easily. Call NHS 111 or your GP if you’re concerned or need any advice.


The main symptoms of gastroenteritis are:

  • Sudden, watery diarrhoea
  • Feeling sick 
  • Vomiting, which can be projectile 
  • A mild fever

Some people also have other symptoms, such as a loss of appetite, an upset stomach, aching limbs and headaches. The symptoms usually appear up to a day after becoming infected. They typically last less than a week, but can sometimes last longer.