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What causes dehydration?

Posted by on Aug. 4, 2016 at 8:30 AM
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8/2: Dehydration What Causes It

Posted by on Aug. 2, 2016 at 9:43 AM
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Our Body of Water

The majority of the body is made up of water with up to 75% of the body's weight due to H2O. Most of the water is found within the cells of the body (intracellular space). The rest is found in the extracellular space, which consists of the blood vessels (intravascular space) and the spaces between cells (interstitial space).

What is Dehydration?

Dehydration occurs when the amount of water leaving the body is greater than the amount being taken in. The body is very dynamic and always changing. This is especially true with water levels in the body. We lose water routinely when we:

  • breathe and humidified air leaves the body;
  • sweat to cool the body; and
  • urinate or have a bowel movement to rid the body of waste products.

In a normal day, a person has to drink a significant amount of water to replace this routine loss.

Causes of Dehydration: Diarrhea

Diarrhea is the most common reason a person loses excess water. Diarrhea consists of unusually frequent or unusually liquid bowel movements and excessive watery evacuations of fecal material. Persistent diarrhea is both uncomfortable and dangerous, as a significant amount of water can be lost with each bowel movement. Worldwide, more than four million children die each year because of dehydration from diarrhea.

Causes of Dehydration: Vomiting

Vomiting is the act of forcible emptying of the stomach, in which the stomach has to overcome the pressures that are normally in place to keep food and secretions within the stomach. The stomach almost turns itself inside out - forcing itself into the lower portion of the esophagus (the tube that connects the mouth to the stomach) during a vomiting episode. Constant vomiting can be a serious cause of fluid loss and it is difficult for a person to replace water if they are unable to tolerate liquids.

Causes of Dehydration: Sweat

The body can lose significant amounts of water when it tries to cool itself by sweating. Whether the body is hot because of the environment (for example, working in a warm environment), intense exercising in a hot environment, or because a fever is present due to an infection; the body uses a significant amount of water in the form of sweat to cool itself. Depending upon weather conditions, a brisk walk will generate up to 16 ounces of sweat (one pound of water).

Causes of Dehydration: Diabetes

In people with diabetes, elevated blood sugar levels cause sugar to spill into the urine, and water then follows, which can cause significant dehydration. For this reason, frequent urination and excessive thirst are among the symptoms of diabetes.

Causes of Dehydration: Burns

The skin has an important role to play in the fluid and temperature regulation of the body. If enough skin area is injured, the ability to maintain that control can be lost. Burn victims become dehydrated because water seeps into the damaged skin. Other inflammatory diseases of the skin are also associated with fluid loss.

Causes of Dehydration: Inability to Drink Fluids

The inability to drink adequately is another potential cause of dehydration. Whether it is the lack of availability of water or the lack of strength to drink adequate amounts, this, coupled with routine or excessive amounts of water loss can compound the degree of dehydration.

by on Aug. 4, 2016 at 8:30 AM
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