Reviewed by Michael Smith on June 26, 2015

Sources

PubMed: "Mild dehydration affects mood in healthy young women.". Daily Mail: "Dry drivers who are dehydrated behind the wheel 'make as many mistakes as drinkers'."

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Video Transcript

While you’re out enjoying the sun this summer, make sure you’re drinking lots of water.

The side effects of dehydration can range from embarrassing, like bad breath, to dangerous, like passing out ... even heat stroke.

Many people are mildly dehydrated and don’t even know it.

Dry mouth and increased thirst might be obvious signs, but there are other signs like fatigue, headaches, and dizziness.

Dehydration can even affect your mood and concentration. A new study found that dehydrated drivers made the same number of mistakes on the road as drunk drivers.

So “Don’t drink and drive” only applies to alcohol.

A simple test is to take a look at your urine.

If the color is dark yellow or amber, you’re probably dehydrated.

If the color is clear or light yellow, URINE good shape.

For WebMD, I’m Dr. Michael Smith.