image from: http://www.drugfreesport.com

The signs and symptoms of dehydration will depend on the severity of the dehydration Mild to Moderate: Dry mouth Tiredness Thirst Headache Decreased urine output Muscle weakness Dizziness or light-headedness Severe: Extreme thirst Irritability Severe decrease in urine output Sunken eyes Shrivelled skin Decrease in Blood Pressure Increase heart rate Fever Delirium This is a medical emergency and immediate medical treatment is required. Treatment of mild-moderate dehydration For exercise-related dehydration, cool water is your best bet. It is better to give frequent small amounts, rather than forcing a large amount of water. Electrolyte solutions or Sports drinks containing electrolytes and a carbohydrate solution also may be helpful to replace lost electrolytes. However, Sports drinks contain a lot of sugar which can cause diarrhea. For infants and children, avoid using only water as a means to replace fluid loss. Children need fluids containing electrolytes, such as Pedialyte. **All text cited from: (http://www.mayoclinic.com) (http://firstaid.webmd.com/dehydration_in_adults_treatment_firstaid.htm)