Vomiting can result from an infection of the digestive tract, severe 

pain or shock, migraine headache, early pregnancy or travel sickness. 

Seek medical advice if it lasts for more than four hours.

The victim may complain of nausea, headache and dizziness. If these 

happen, help him to rest in bed. Give him small pieces of ice to suck and

small sips of clear fluid such as carbonated drinks. Avoid giving solid  

food or dairy products.

If vomiting has continued for more than four hours, seek medical help.