Dehydration Say: dee-hy-dray-shun Don't sweat this long word! It describes what happens when there's not enough water in your body. Be sure to drink a lot of water to stay happily hydrated. Back to Articles Related Articles Note: All information is for educational purposes only. For specific medical advice, diagnoses, and treatment, consult your doctor. © 1995-2021 KidsHealth®. All rights reserved. Images provided by The Nemours Foundation, iStock, Getty Images, Veer, Shutterstock, and Clipart.com.