Dehydration occurs when the body does not receive enough fluids to function optimally.
The body also loses essential electrolytes, including potassium, magnesium, and sodium.
While mild dehydration is common and generally easy to manage, severe dehydration can lead to fatal complications or serious injuries that require emergency room treatment.
Dehydration occurs when the body does not receive enough fluids to function optimally. This condition varies in severity—classified as mild, moderate, or severe—depending on the volume of body fluids lost through urination, sweating, vomiting, or diarrhea.
Fluid loss involves more than just water. The body also loses essential electrolytes, including potassium, magnesium, and sodium. These minerals are necessary for fundamental bodily functions, such as talking, moving, and breathing.
While mild dehydration is common and generally easy to manage, severe dehydration can lead to fatal complications or serious injuries that require emergency room treatment. Low blood volume in severe cases can result in hypovolemic shock, cardiac arrhythmia, or seizures.
Most people recognize common indicators that it is time to drink water or a low-sugar sports drink high in electrolytes, such as fatigue, dry mouth, or thirst. However, some symptoms of dehydration are less obvious.
Unusual Indicators of Dehydration
One unexpected sign of dehydration is bad breath. Saliva possesses antibacterial properties, but the body cannot produce sufficient amounts of saliva when dehydrated, which allows bacteria to grow in the mouth.
Dehydration You Should Know About Unusual Indicators of
John Higgins, MD, a senior cardiologist at Lyndon B. Johnson Hospital and professor of medicine at UT Health Houston’s McGovern Medical School, explains the connection between saliva and oral hygiene.
If you’re not producing enough saliva, you can get bacterial overgrowth in the mouth, and one of the side effects of that is bad breath
John Higgins, MD
This process is similar to why individuals often experience morning breath, as saliva production slows during sleep, leading to bacterial growth and an unpleasant taste.
Skin changes also serve as indicators. While some believe dehydration causes excessive sweating, Dr. Higgins notes that as dehydration progresses, the skin actually becomes very dry and may appear flushed.
A lot of people think that people who get dehydrated are really sweaty, but in fact, as you go through various stages of dehydration, you get very dry skin
John Higgins, MD
A loss of skin elasticity is another key symptom. This results in the skin remaining tented after it has been pinched, taking longer than usual to return to its normal state.
Muscle cramps are another symptom, often linked to heat illness when the body cannot cool itself effectively. This is common during exercise in hot weather, though dehydration can occur in cooler temperatures if fluids are not replaced.
The hotter you get, the more likely you are to get muscle cramps, and that’s from a pure heat effect on the muscles. As the muscles work harder and harder, they can seize up from the heat itself. Changes in the electrolytes, such as sodium and potassium, can lead to muscle cramping as well
Dehydration You Should Know About Skin
John Higgins, MD
The importance of electrolytes in preventing these cramps was highlighted in a study of 86 half-marathon athletes. The findings showed that participants who rehydrated with a drink containing electrolytes were less likely to develop muscle cramps than those who drank only plain water.
Fever and chills can also signal dehydration or heat illness. Heat exhaustion may be characterized by skin that feels cool to the touch accompanied by excessive sweating. However, if the body temperature continues to rise, the skin may become hot, dry, and flushed.
The Centers for Disease Control and Prevention (CDC) advises that individuals should cool themselves down immediately and seek medical professional help if the skin becomes hot, flushed, and dry. Short-term strategies include moving to a cool area and applying cool, wet cloths or ice.
Infants and children are particularly vulnerable to fluid loss from fever, vomiting, and severe diarrhea. Pediatric signs of dehydration include a sunken spot on the head, a lack of tears when crying, or fewer wet diapers than usual.
dehydration can trigger food cravings, particularly for sweets. Dr. Higgins states that when the body lacks water, it becomes difficult for organs like the liver to release components of energy stores, such as glycogen (stored glucose).
When you’re dehydrated, it can be difficult for organs such as the liver, which uses water, to release glycogen [stored glucose] and other components of your energy stores, so you can actually get cravings for food
John Higgins, MD
Finally, even mild dehydration can result in headaches. In such cases, sipping fluids throughout the day and drinking a full glass of water can help ease the pain.
Assessing Hydration Levels
While thirst is a primary indicator, its absence does not necessarily mean a person is well hydrated. There are two physical methods to check hydration levels.
6 Unusual Signs of Dehydration You Should Know About
The Skin Test: Using two fingers, pinch the skin on the back of the hand and release. If the skin returns to its normal position in less than a couple of seconds, it is generally normal. If it returns more slowly, it may indicate dehydration.
Urine Color: Well-hydrated individuals typically have urine that is mostly clear with a tinge of yellow, similar to light lemonade. Amber or orange colors serve as warning signs to increase fluid intake. Conversely, completely transparent urine may indicate excessive water intake.
When to Seek Emergency Care
Mild dehydration can be managed at home with water and electrolytes, but severe symptoms require immediate medical attention via 911 or an emergency room.
Adults with a fever of 103 degrees F or higher should contact a doctor. Immediate emergency treatment is necessary if a fever is accompanied by chest pain, difficulty breathing, confusion, persistent vomiting, or seizures.
Other critical warning signs that require emergency intervention include:
