Dehydration in Children — Signs, Home Care & When to Call a Doctor

Dehydration happens when a child loses more fluid than they take in — most often from vomiting, diarrhoea, , or inadequate drinking during hot Indian summers. Young children, especially infants under two years, have smaller fluid reserves and can become dehydrated quickly. Recognising early signs and starting oral rehydration at home can prevent serious complications. However, severe dehydration is a and requires immediate hospital care.

Signs and Stages of Dehydration in Children

• Mild dehydration — slightly dry lips, fewer wet nappies or toilet visits, thirst, mild irritability; skin still springs back quickly when pinched
• Moderate dehydration — noticeably dry mouth and tongue, sunken eyes, reduced tears when crying, dark yellow urine, lethargy, cool hands and feet
• Severe dehydration — very sunken fontanelle (soft spot) in infants, no urine for 8+ hours, unable to drink, extreme sleepiness or unresponsiveness, rapid breathing, cold mottled skin
• Common causes in India — viral gastroenteritis, food-borne illness during summer, heat exposure, prolonged , and inadequate breastfeeding during illness
• High-risk groups — infants under six months, premature babies, children with chronic kidney or heart disease, and those already malnourished

Home Care Steps for Mild to Moderate Dehydration

Clinical guidance from CDC^[1] stresses matching home care to symptom severity and seeking urgent review when red-flag signs appear.

What to Avoid

• Commercial sports drinks or soda — high sugar content can worsen diarrhoea
• Homemade salt-sugar solutions without precise measurement — incorrect ratios can be dangerous
• Anti-vomiting or anti-diarrhoea medicines in young children unless prescribed by a doctor
• Withholding all food for more than 24 hours during gastroenteritis
• Delaying medical review when signs of moderate dehydration appear

When to See a Paediatrician

• Signs of moderate dehydration that do not improve within a few hours of ORS
• Blood in stool, high fever above 39°C, or severe abdominal pain
• Infants under three months with vomiting or diarrhoea of any severity
• Dehydration in a child with , kidney disease, or immune suppression
• Weight loss of more than 5% of body weight during illness
• Parental concern or uncertainty about the child’s condition — trust your instinct

For verification and deeper reading, NHS^[2] offers independent, evidence-based information you can cross-check with your own clinician.

Frequently Asked Questions

How much ORS should I give my child?

For mild dehydration, offer ORS after each loose stool or vomit — roughly 10 ml per kg of body weight. A 10 kg toddler would receive about 100 ml per episode. For moderate dehydration, your doctor may recommend a calculated volume over four hours. Always follow the paediatrician’s guidance rather than guessing amounts.

Can I use rice water or coconut water instead of ORS?

Rice water (kanji) and tender coconut water are sometimes used in Indian households for mild cases, but they do not contain the precise electrolyte balance of WHO-formula ORS. For confirmed or moderate dehydration, ORS is the medically recommended standard. Coconut water may supplement fluids in older children with mild illness but should not replace ORS when dehydration is suspected.

When is dehydration most dangerous for infants?

Infants under six months dehydrate fastest because their body water turnover is high and they cannot communicate thirst. A sunken fontanelle, absence of tears, and fewer than four wet nappies in 24 hours are urgent . Any vomiting or diarrhoea in a newborn warrants same-day medical assessment.

Should I stop milk during gastroenteritis?

Do not stop breastfeeding — it provides fluids, nutrition, and antibodies. For older children on cow’s milk, brief reduction may help if diarrhoea is severe and lactose intolerance is suspected, but complete milk withdrawal is usually unnecessary. Curd (yogurt) is often well tolerated and supports gut recovery.