The following measures can be used to deal with the situation of children vomiting what they eat: First, give the child a temporary meal. Some children with acute gastritis may experience violent vomiting, and vomiting may be evident even when children are given water to drink. Second, give children timely hydration and electrolytes. Because children lose water and electrolytes when they vomit, they may become dehydrated and hypokalemic if they are not rehydrated in time. Glucose, along with potassium chloride and other medications, can be given to children for fluid replacement.