Dehydration occurs when the body loses too much water. This can occur if a child loses large amounts of fluid through diarrhea, vomiting, or sweating. Dehydration decreases the amount of blood that circulates to the child's organs.

Dehydration in small children can develop rapidly and be very dangerous. Watch closely for early signs of dehydration any time your child has a high fever, vomiting, diarrhea, or is too sick to drink.

A young child will not be able to tell you if he or she is feeling dehydrated, so you must look for the symptoms.

Severe dehydration means:

• The child's mouth and eyes may be extremely dry.
• The child may pass little or no urine for 12 or more hours.
• The child may not seem alert or able to think clearly.
• The child may be too weak or dizzy to stand.
• The child may pass out.

Severe dehydration is a medical emergency. Call or other emergency services immediately.

Moderate dehydration means:

• The child may be a lot more thirsty than usual.
• The child's mouth and eyes may be drier than usual.
• The child's urine may be much darker than usual.
• The child may pass little or no urine for 8 or more hours.
• The child may feel dizzy when he or she stands or sits up.

Mild dehydration means:

• The child may be more thirsty than usual.
• The child's urine may be darker than usual.

By	Healthwise Staff
Primary Medical Reviewer	William H. Blahd, Jr., MD, FACEP - Emergency Medicine
Specialist Medical Reviewer	H. Michael O'Connor, MD - Emergency Medicine
Last Revised	May 2, 2011