Get plenty of rest, as you will almost certainly feel drained of energy.
Drink as much water or clear fluid as you can manage. If you are finding it hard even to keep water down, take tiny sips through a straw. If you have the appetite for them, try juices and soups, too.
Eat as soon as your appetite returns. Try small, light meals, including carbohydrate-rich foods, such as bread, potatoes, pasta or rice. It’s best not to have rich or spicy foods.
Have a probiotic yoghurt or drink daily to help your digestive system get back to normal.
Allow yourself plenty of time to recover.

If you do have diarrhoea and vomiting, don’t panic.
Make sure you rest as much as possible.
Drink plenty of water through the day.
Eat small, light meals if you are hungry and it doesn’t make you feel sick. If you are not hungry, you do not have to eat for 24 hours so long as you drink plenty of fluid.
Wash your hands before and after going to the toilet and after vomiting.
If the diarrhoea does not go away within 48 hours, see your GP.