Your body becomes dehydrated when you lose more fluids than you take in. The most common ways in which this occurs are from vomiting, diarrhea, excessive sweating, and fever. Fluids that will aid in re-hydration can include anything from water to chicken broth or juice. However, not all fluids will help to restore your body's hydration. Because they are diuretics (aid in expelling fluids from the body), caffinated and alcoholic beverages can actually exacerbate dehydration.

Most healthy adults can easily re-hydrate simply by drinking a few glasses of water. On the other hand, if dehydration becomes severe, it may be necessary to seek medical help, as severe dehydration can lead to a number of serious medical conditions including coma and death.