Dehydration happens when your child loses too much liquid. You can prevent dehydration by increasing the amount of liquid your child drinks. Early signs Call your child's doctor immediately if your child shows any of these signs. Do not wait for the later signs of dehydration. Child has not urinated in 6 hours.
Child is less active than normal or is unusually sleepy.
Child's urine is dark yellow and may smell strong like ammonia. Child's mouth is dry and sticky. Child's eyes are sunken. Child has no energy and is difficult to wake up. Child has a fever.