Dehydration

Dehydration is the loss of fluid and electrolytes that the body of excess fluid or electrolyte imbalance in the body.
Dehydration can be caused by loss of body fluid electrolyte overload, because of lack of drinking, diarrhea, or excessive sweating, because they stung the sun hot enough and long.

Symptoms:

     * Eyes sunken, the skin is not elastic, dry and dull.
     * The thirst, chapped lips and dry tongue a little urine

Causes:
Severe diarrhea and vomiting or severe heat stroke, lack of drinking water.