Dehydration and Electrolyte Imbalance

30 April 2025 | Author Synphaet Lamlukka

Dehydration and Electrolyte Imbalance

During the summer, when temperatures rise rapidly, our bodies lose significant amounts of water and electrolytes without realizing it. This is especially true for the elderly, whose bodies cannot adapt as well as younger people. “Dehydration and electrolyte imbalance” therefore become silent threats that can lead to serious conditions if not carefully managed.

 

Dehydration occurs when the body loses more water than it takes in, resulting in a decrease in blood volume. This affects blood circulation, temperature regulation, and the function of various organs.

Electrolyte Imbalance refers to the disruption of essential minerals such as sodium, potassium, and calcium. This imbalance can affect the nervous system, heart, and muscles, and severe deficiency may be life-threatening.

Why Are the Elderly More at Risk?

  • Reduced thirst mechanism causes them not to feel thirsty even when dehydrated.

  • Decreased kidney function limits their ability to retain water effectively.

  • Use of diuretics or blood pressure medications leads to greater fluid loss.

  • Limited mobility which may delay access to drinking water.

  • Multiple chronic diseases such as diabetes and heart disease affect water and electrolyte balance.

 

Warning Signs of Dehydration and Electrolyte Imbalance

  • Excessive thirst
  • Dry mouth, dry tongue, and poor skin elasticity

  • Fatigue, dizziness, and lightheadedness when standing

  • Reduced urination with dark-colored urine

  • Confusion and incoherent speech (especially in the elderly)

  • Rapid pulse and shortness of breath

 

Prevention Guidelines

  • Drink water regularly: Don’t wait until thirsty; sip water every 1-2 hours.

  • Avoid direct sunlight: Stay in the shade or air-conditioned rooms during hot weather.

  • Wear light, breathable clothing

  • Avoid caffeine and alcohol as they have diuretic effects.

  • Eat foods with high water content such as fruits and soups

  • Check current medications to see if they affect water retention.

  • Monitor symptoms regularly and consult a doctor immediately if changes occur.

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