Hydration, Dehydration & Heatstroke: Treatment

Inadequate intake of fluids is a leading cause of dehydration with many people not ensuring that they have the recommended 2 - 2.5 litres of water a day. Mild dehydration during the summer months is very common however if combined with a high amount of sun exposure it can result in heat exhaustion or heatstroke.

Common signs and symptoms of dehydration include:

• Thirst. Thirst is often the first sign of dehydration. When the body is lacking fluids, it sends signals to the brain indicating the need for water.
• Dry mouth and lips. Decreased saliva production can lead to a dry mouth and parched lips, contributing to feelings of thirst and discomfort.
• Dark urine. Dehydration can cause urine to become darker in colour, ranging from amber to deep yellow. This occurs because the kidneys conserve water by producing concentrated urine.
• Infrequent urination. In dehydration, the body conserves water by reducing urine output, leading to infrequent urination or decreased urine volume.
• Fatigue and weakness. Dehydration can result in fatigue, weakness, and decreased energy levels as the body's cells and organs lack adequate hydration to function optimally.
• Dizziness or lightheadedness: Dehydration can cause a drop in blood pressure and reduced blood flow to the brain, leading to dizziness, lightheadedness, or fainting.
• Headache. Dehydration may trigger headaches or migraines due to changes in blood flow and electrolyte imbalances in the brain.
• Dry skin. Insufficient hydration can lead to dry, flaky skin and exacerbate skin conditions such as eczema or psoriasis.
• Muscle cramps. Dehydration can disrupt electrolyte balance, leading to muscle cramps, spasms, or twitching, particularly during physical activity.
• Rapid heartbeat. In severe dehydration, the heart may beat faster to compensate for decreased blood volume and maintain adequate circulation, resulting in palpitations or an irregular heartbeat.
• Sunken eyes. Dehydration can cause the eyes to appear sunken or hollowed out due to reduced fluid levels in the body.
• Confusion or irritability. Severe dehydration can impair cognitive function and mood, leading to confusion, irritability, or difficulty concentrating.
• Decreased skin elasticity. Dehydration may decrease skin turgor or elasticity, causing the skin to lose its ability to bounce back when pinched or pulled gently.
• Weak pulse. In extreme cases of dehydration, the pulse may become weak or difficult to detect due to reduced blood volume and circulation.

It is a medical emergency that requires immediate treatment to prevent serious complications and death. Symptoms of heatstroke can vary in severity but may include:

1. High body temperature. Heatstroke is marked by a core body temperature of 40°C (104°F) or higher. This elevated temperature is a hallmark feature of heatstroke and distinguishes it from less severe heat-related illnesses like heat exhaustion.

2. Altered mental state. Heatstroke can cause confusion, agitation, delirium, hallucinations, disorientation, or even loss of consciousness. Changes in mental status may indicate central nervous system dysfunction due to the effects of extreme heat on the brain.

3. Flushed skin. The skin may appear flushed, red, hot, and dry to the touch. Profuse sweating, which is common in milder forms of heat-related illness, may cease in cases of severe heatstroke as the body's thermoregulatory mechanisms become overwhelmed.

4. Rapid heart rate. Heatstroke can lead to an elevated heart rate (tachycardia) as the body attempts to cool itself by increasing blood circulation. However, in severe cases, the pulse may become weak or difficult to detect.

5. Rapid breathing. Breathing may become rapid (hyperventilation) as the body attempts to expel heat and maintain adequate oxygenation of tissues.

6. Nausea and vomiting. Heatstroke can cause nausea, vomiting, and gastrointestinal distress, which may contribute to dehydration and electrolyte imbalances.

7. Headache. Intense headaches or throbbing head pain may occur as a result of dehydration, heat-induced blood vessel dilation, and increased intracranial pressure.

8. Muscle cramps or weakness. Heatstroke may cause muscle cramps, weakness, or fatigue due to electrolyte imbalances, dehydration, and heat-induced muscle strain.

9. Seizures. In severe cases of heatstroke, seizures or convulsions may occur as a result of the brain's inability to regulate electrical activity due to extreme heat exposure.

10. Unconsciousness. Heatstroke can lead to loss of consciousness or coma if not promptly treated. Loss of consciousness is a medical emergency requiring immediate intervention to prevent further complications and preserve life.

To avoid dehydration and maintain proper hydration levels, consider implementing the following top 10 recommended Healthwords strategies:

Listen to your body. Be attentive to thirst cues and other signs of dehydration, such as dry mouth, fatigue, dizziness, or dark urine. Drink fluids regularly throughout the day, even if you don't feel thirsty, to maintain hydration and support overall well-being.

If you have been unable to keep down fluids for over 12 hours or have had severe diarrhoea or are feeling weak then it is best to be reviewed by your doctor. If you have any of the symptoms of heatstroke then you should be attending the hospital without delay.