What is Dehydration
Water makes up approximately 50–75 % of our body mass and is essential for producing sweat, urine, digestive fluids, and blood. Since the body cannot store water long-term, it is crucial to consume sufficient fluids each day. When fluid intake does not meet the body’s needs, this condition is known as dehydration, which can manifest in various symptoms. While mild dehydration is generally manageable, severe dehydration can become life-threatening and may require immediate medical attention.
Signs of Dehydration
The manifestations of dehydration vary based on its severity. Common indicators of mild to moderate dehydration include:
- Thirst
- Dryness of the tongue, lips, and mouth
- Feeling light-headed or dizzy
- Headache
- Darker-than-normal urine
- Reduced urine output
When dehydration reaches a more critical level, symptoms can escalate to:
- Intense thirst
- Extremely dry mouth
- Rapid breathing
- Increased heart rate
- Decreased blood pressure
- Fever
- Little or no urine production
- Feeling irritable, drowsy, or confused
In infants and young children, signs may differ by age and can include:
- Absence of tears while crying
- Dry nappies (fewer wet diapers than usual)
- Sunken appearance of eyes or cheeks
- Sunken fontanelle (soft spot on the head)
- Irritability
- Drowsiness and lack of energy
Causes of Dehydration
A variety of factors can lead to dehydration, including:,
- Excessive sweating from exercise or hot weather
- Vomiting and diarrhoea
- Fever
- Consuming too much alcohol
- Certain medications, such as diuretics or blood pressure drugs
- Increased urination due to complications of diabetes
- Not drinking enough water
Who Is Susceptible to Dehydration?
Although anyone can become dehydrated, some groups are particularly vulnerable:,
- Infants and children, who are more prone to vomiting and diarrhoea and may not be able to communicate thirst or fetch fluids themselves
- Older adults, who often have lower fluid reserves and may struggle to access drinks due to decreased mobility
- Individuals with chronic illnesses (e.g. diabetes or kidney disease)
- People working in high-heat environments, such as welders, bakers, or dry cleaners
- Athletes or anyone engaging in intense physical activity
Why Is Dehydration Hazardous?
If not addressed, dehydration can result in serious complications, such as:
- Heat exhaustion or heat stroke
- Urinary tract infections (UTIs), kidney stones, or even kidney failure
- Seizures
- Hypovolemic shock (a dangerous drop in blood pressure and oxygen levels)
In extreme cases, untreated dehydration can be fatal.
Managing Dehydration
For mild dehydration, the most effective steps are:
- Move to a cool area
- Loosen any tight clothing and remove unnecessary layers
- Drink small sips of water frequently
Oral rehydration solutions, combinations of electrolytes and carbohydrates dissolved in water, can be particularly beneficial after episodes of vomiting or diarrhoea. Your pharmacist can recommend the most appropriate formulation. In cases of severe dehydration, hospital treatment may be necessary, where intravenous (IV) fluids are administered to restore both water and electrolyte balance.
Preventing Dehydration
You can reduce the risk of becoming dehydrated by:
- Drinking ample water and consuming water-rich foods, like fruits and vegetables
- Staying hydrated before, during, and after vigorous exercise
- Avoiding exercise in excessively hot conditions
- Increasing fluid intake on hot or humid days when sweating is more pronounced
- Using oral rehydration solutions as soon as vomiting or diarrhoea begins
- Drinking extra fluids when ill
When to Consult a Doctor
Seek medical attention if you exhibit symptoms of severe dehydration or if mild/moderate signs do not improve despite self-care efforts. For young children, contact a doctor if they:
- Vomit multiple times within 24 hours
- Refuse all fluids for several hours
- Are under 12 months and not consuming breast milk or formula
- Have vomit that is green, red, or brown
- Show persistent signs of dehydration despite receiving fluids
Strategies to Increase Water Consumption
For those who struggle to stay adequately hydrated, consider these tips:
- Make water your default beverage of choice
- Keep a water bottle on your desk or carry one when you go out
- Drink a glass of water with every meal and snack
- Infuse water with fruits or vegetables for added flavor
- Try sparkling water for variety
By following these guidelines, you can better maintain optimal hydration and reduce the risk of dehydration and its associated complications.