Vomiting in children increases their  risk for dehydration especially if the child has fever  which causes them to sweat more or loss of fluid through diarrhea. Prolonged  and severe vomiting can cause a child to lose sodium, potassium and chloride . These minerals are essential in transmission of nerve impulse and the contraction of muscles. They are also essential in regulating body fluid balance.

It is essential for a sick child to take in water to take care of the normal daily needs as  well as extra to make up for  fluid loss and prevent dehydration.

Young children are especially at high risk of dehydration because they  are less efficient   at conserving water than older kids and adults. You should also know that small body size means it takes less fluid loss to cause dehydration.

How to prevent dehydration in your vomiting child

• offer small sips of water . If your child doesnt feel like drinking, give him ice chips to suck on. Start from 1 oz an hour, then 2 oz an hour until the child is able to drink normally
• your pediatrician may also recommend  a commercial rehydration  liquid to replace lost sodium and potassium  in a young child. This may come in the form of a popsicle to make it more appealing to the child. It also ensures that the liquid is taken slowly. Older children may take commercial sports drinks however they should be used with care. They replace salts but also contains large amounts of sugar which can make diarrhea worse.
• a child who wants to change from plain water may have fruit juice diluted half and half with water or flat soda.

If your child is too sick to drink or shows signs of dehydration such as dry mouth, fewer tears or less urination, seek immediate medical care