Neither vomiting nor diarrhea alone are cause for alarm. Most gastroenteritis or food poisoning is unpleasant, but should go away in 24 hours or so. As long as the symptoms are relatively infrequent and some nutrition seems to stay down, your child is probably fine. Give your child lots and lots of fluids (camomile or other herbal, non-dehydrating tea, sports beverages with sugar and electrolytes or even just water are all good choices) and easy to digest foods such as white bread, rice or congee porridge.
If, however, your child is experiencing severe, intense vomiting and cannot keep either food or liquid down even briefly, or has diarrhea for eight hours or so, it’s time to call in the experts. Either of these can lead to severe dehydration, in which case they may need an IV drip with electrolytes to keep their system stable. This is especially true for younger children, who are affected much more quickly.
Also, if you notice that your child is vomiting or excreting blood or blood clots, talk to a doctor immediately.

