Dehydration is the condition that results when too much body fluid is lost.
The body is about two-thirds water. When the total water level drops by only a few percent, the person becomes dehydrated. Dehydration results when fluid loss is greater than fluid intake.
The causes of dehydration include:
Mild dehydration has few risks, and drinking fluids can easily rehydrate the person. Dehydration is sometimes severe. Serious cases usually occur in infants, sick people, athletes, and the elderly. Unless severe dehydration is treated very quickly, death can result.