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Dehydration in Adults

Dehydration in Adults Overview

Dehydration is a condition that occurs when the loss of body fluids, mostly water, exceeds the amount that is taken in. With dehydration, more water is moving out of our cells and then out of our bodies than the amount of water we take in through drinking.

We lose water every day in the form of water vapor in the breath we exhale and as water in our sweat, urine, and stool. Along with the water, small amounts of salts are also lost.

When we lose too much water, our bodies may become out of balance or dehydrated. Severe dehydration can lead to death.

Dynamic Picture of Dehydration

 

Dynamic Picture of Rehydration



Next: Causes of Dehydration in Adults »

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Dehydration (Adults)

Gastroenteritis Overview

Gastroenteritis is a condition that causes irritation and inflammation of the stomach and intestines (the gastrointestinal tract). Diarrhea, crampy abdominal pain, nausea, and vomiting are the most common symptoms.

Viral infection is the most common cause of gastroenteritis but bacteria, parasites, and food-borne illness (such as shellfish) can be the offending agent.

Many people who experience the vomiting and diarrhea that develop from these types of infections or irritations think they have "food poisoning," and they may indeed have a food-borne illness. Many people also refer to gastroenteritis as "stomach flu," although influenza has nothing to do with the condition.

Travelers to foreign countries may experience "traveler's diarrhea" from contaminated food and unclean water.

  • The severity of infectious gastroenteritis depends on the immune system's ability to resist the infection...

Read the Gastroenteritis (Stomach Flu) article »



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Hyperosmolar hyperglycemic state (HHS) is one of two serious metabolic derangements that occurs in patients with diabetes mellitus and can be a life-threatening emergency.

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Medical Dictionary