INSUFFICIENT BODY FLUID

Dehydration

Q: How much water should I drink per day?

Most adults benefit from 1.5 to 2 litres of fluid per day, with more needed in hot weather, during exercise, illness or fever. Older adults may need particular attention as thirst sensation reduces with age.

Q: When is dehydration an emergency?

Severe dehydration with confusion, severe weakness, very low urine output, low blood pressure, fainting or rapid heartbeat is an emergency requiring urgent hospital evaluation and intravenous fluid replacement.

Q: Is sports drink or plain water better for hydration?

For most everyday hydration, plain water is sufficient. For significant fluid losses such as vomiting, diarrhoea, prolonged intense exercise or heat exposure, oral rehydration solution or balanced electrolyte drinks may be more effective than water alone.

A condition in which the body loses more fluid than it takes in, causing tiredness, dizziness, reduced urine output and, in severe cases, organ dysfunction. Common in hot weather, illness and old age.

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Dehydration assessment and fluid replacement in Hyderabad

Common ACROSS ALL AGES

Often Preventable WITH GOOD HYDRATION

Quickly Treatable ONCE RECOGNISED

ABOUT THIS CONDITION

What is Dehydration

Dehydration occurs when the body loses more fluid than it takes in, leading to inadequate water in the body to perform normal functions. It can result from inadequate fluid intake, excessive fluid loss (sweating in hot weather or during exercise, vomiting, diarrhoea, fever, increased urination from uncontrolled diabetes or diuretic use), or both. Older adults, infants, young children, those with chronic illness and people exposed to hot weather or intense physical activity are at particular risk. Typical features include thirst, dry mouth and skin, reduced urine output, dark concentrated urine, tiredness, dizziness, headache, muscle cramps and reduced skin elasticity. Severe dehydration can cause confusion, low blood pressure, rapid heart rate, fainting, kidney injury and, in extreme cases, shock and life-threatening complications. Diagnosis is based on clinical features, with blood and urine tests in moderate to severe cases. Treatment involves fluid replacement — oral rehydration in mild cases and intravenous fluids in moderate to severe cases — along with treatment of any underlying cause. Dr. Patnam Pravallika Reddy provides comprehensive evaluation and care at Lux Hospitals, Hyderabad.

SIGNS TO WATCH

Common Symptoms

⚠️

Symptoms that need attention

Thirst and dry mouth Reduced urine output and dark concentrated urine Tiredness and weakness Dizziness, particularly on standing Headache Muscle cramps Confusion, rapid heart rate and low blood pressure in severe cases

WHY IT HAPPENS

Causes & Risk Factors

Inadequate fluid intake
Excessive sweating in hot weather or exercise
Vomiting and diarrhoea
Fever and infections
Uncontrolled diabetes with increased urination
Diuretic and certain other medications
Older age — reduced thirst sensation

CLINICAL DETAILS

KeyFacts

Diagnosis

Clinical features with blood and urine tests in moderate to severe cases

Severity

Mild · Moderate · Severe — based on symptoms, weight loss and vital signs

Treatment

Oral or intravenous fluid replacement with treatment of underlying cause

High-risk groups

Older adults, infants, those with chronic illness, hot climate workers

Prevention

Adequate fluid intake, especially in hot weather and during illness

Hospital

Available at Lux Hospitals, Hyderabad

HOW WE TREAT IT

Treatment Approach

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Fluid Replacement with Cause Treatment

The most effective approach is prompt fluid replacement — oral rehydration solution in mild cases, intravenous fluids in moderate to severe cases — combined with treatment of the underlying cause and preventive measures to avoid recurrence.

1

Consultation & Assessment

Dr. Pravallika reviews fluid intake, losses and symptoms, examines the patient, assesses hydration status and arranges blood and urine tests when needed.
2

Treatment Planning

A personalised plan is created based on severity, fluid status and underlying cause.
3

Medical Management

Oral or intravenous fluid replacement, electrolyte correction when needed, treatment of underlying causes and supportive care.
4

Recovery & Follow-up

Follow-up to confirm recovery and counselling on prevention of recurrence.

AVAILABLE TREATMENTS

Treatment Options

Oral Rehydration in Mild Cases

Mild dehydration is treated with oral fluids including oral rehydration solution, which is particularly effective and contains balanced electrolytes.

Intravenous Fluid Replacement in Moderate to Severe Cases

Moderate to severe dehydration is treated with intravenous fluids tailored to the patient's needs and any electrolyte imbalances.

Treatment of Underlying Cause

Specific treatment of vomiting, diarrhoea, infections, uncontrolled diabetes or medication side effects supports recovery and prevents recurrence.

Electrolyte Correction When Needed

Electrolyte imbalances that often accompany dehydration are corrected alongside fluid replacement.

Prevention Counselling

Patients are counselled on adequate fluid intake — particularly in hot weather, during exercise, in illness and in older age — to prevent recurrence.

COMMON QUESTIONS

Frequently Asked Questions

How much water should I drink per day?+

When is dehydration an emergency?+

Is sports drink or plain water better for hydration?+

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