It can feel worrying when your child is unwell and drinking much less than usual. Some children may refuse fluids, vomit after drinking, pass urine less often, or seem more tired than they normally do. Dehydration in children can happen when the body does not have enough fluid for normal daily function. This may occur during illnesses with fever, vomiting, diarrhoea, poor appetite, mouth pain, sore throat, or reduced fluid intake. Hot weather, active play, and sweating may al