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Severe dehydration

By the time a person becomes severely dehydrated, there is no longer enough fluid in the body to carry enough blood to vital organs. Shock, which is a life-threatening condition, can develop quickly.

A severely dehydrated person may not be able to cooperate or communicate.

Symptoms of severe dehydration (even if only one of them is present) include:

  • Altered behavior, such as severe anxiety, confusion, or not being able to stay awake.
  • Faintness that is not relieved by lying down, or lightheadedness that continues after standing for 2 minutes.
  • Inability to stand or walk.
  • Rapid breathing.
  • Weak, rapid pulse.
  • Cold, clammy skin or hot, dry skin.
  • Little or no urine for 12 hours or longer.
  • Loss of consciousness.

Severe dehydration is a medical emergency and requires emergency treatment. Call911or other emergency services immediately.

Author Jan Nissl, RN, BS
Editor Susan Van Houten, RN, BSN, MBA
Editor Sydney Youngerman-Cole, RN, BSN, RNC
Associate Editor Tracy Landauer
Primary Medical Reviewer William M. Green, MD
- Emergency Medicine
Specialist Medical Reviewer H. Michael O'Connor, MD
- Emergency Medicine
Last Updated July 6, 2007

WebMD Medical Reference from Healthwise

Last Updated: July 06, 2007
This information is not intended to replace the advice of a doctor. Healthwise disclaims any liability for the decisions you make based on this information.