If your child is hard to wake, unable to drink, blue or struggling severely to breathe, call 115 or seek the nearest emergency care; do not wait to finish making ORS. For an alert child who can drink, the important question is not simply how many stools have passed. It is whether fluid losses are being replaced, and whether home care is still enough.
The short version
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ORS replaces water and electrolytes; it does not immediately stop loose stools.
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Mixing volume is product-specific; feeding, drinking, urine and alertness guide the next step.
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Look at the child, not only the nappy
A breastfed baby's usual stools may already be soft and frequent. Look for a change from that child's pattern: more watery stools, a sudden increase, vomiting or poorer feeding. Stool colour cannot tell you whether this is rotavirus or a bacterial infection. UNICEF Viet Nam highlights the combined fluid losses from vomiting, fever and diarrhoea. A baby need not have a dramatic stool count to need help.
Less urine, a dry mouth, sunken eyes or unusual tiredness warrant early medical advice, especially in a young baby. Blood in the stool, significant abdominal pain or vomiting that prevents fluid intake needs urgent assessment. Do not wait for every dehydration sign or use a home skin-pinch test to declare the child safe. When calling, lead with age and what has changed, rather than a guessed diagnosis.
ORS has a different job from stopping diarrhoea
Oral rehydration solution supplies water and electrolytes lost through stools and vomit. Loose stools may continue while it is helping. Another dirty nappy therefore does not mean you should make the next batch stronger or immediately switch medicines. Watch whether the child accepts and retains fluids, urinates and interacts more normally. Persisting dehydration or deterioration calls for reassessment, not a more concentrated drink.
At the pharmacy, try: I need an oral rehydration product suitable for a child. Please show me this packet's water volume and storage instructions. Sports drinks, soda and juice are not equivalent to ORS. Nor should an internet article become an improvised sugar-and-salt recipe for a baby without appropriate guidance. If the product is unavailable or the child cannot manage fluids, seek help instead of spending hours trying substitutes.
Mix this sachet, not the one you remember
Read the label before opening the packet. Use the powder as instructed with the exact stated volume of safe water, measured in a clearly marked container. Products can require different volumes; packet size or taste is not a measuring method. Do not split powder by eye or add sugar, salt, milk or rice water. If the print or language is difficult, ask the pharmacist to write product-specific instructions.
A common handover problem is a prepared bottle with no one sure how much water went into it. Do not repair it by tasting and adding water. If you cannot establish the preparation, discard the uncertain batch and make a fresh one correctly. Label a clean covered container with the preparation time and follow the product's storage and discard instructions. Keep the wrapper beside the measuring equipment for the next caregiver.
Offer slowly without postponing care
For an alert child who can swallow, repeated small sips or spoonfuls are often more manageable than a large cup. After vomiting, a brief pause followed by a slower attempt may help, following clinical advice. Never force fluid into a drowsy child or one struggling to breathe. The amount needed depends on age, weight, dehydration and ongoing losses; ask a health professional rather than using one volume for every child.
A short note is more useful than an elaborate spreadsheet: when illness began, recent feeding or drinking, last urine and any blood in stools. For example: Watery stools began this afternoon; feeding fell this evening and wet nappies are noticeably fewer than usual. That describes a trend. Documentation is not an entry requirement for care. If the child is deteriorating in front of you, put the phone down and get help.
Food should not become another ordeal
Continue breastfeeding. For a child already eating solids, offer small portions of familiar, age-appropriate cooked food and follow appetite rather than imposing a fast to rest the bowel. Prepare formula at its usual strength unless a clinician provides an individual plan. Porridge can be comforting food, but it does not replace ORS's electrolyte role. The aim is manageable nutrition, not finishing a bowl to prove recovery.
Antidiarrhoeals and antibiotics are not an automatic next step. A clinician may recommend zinc or another treatment, but the product and instructions need to fit this child; a sibling's prescription is not a model. When several adults help, nominate one person to coordinate medicines and report everything already given. Avoiding duplicate or unnecessary products matters more than adding another supplement advertised for gut health.
As things improve, simplify rather than disengage
Wash with soap after nappies and before food preparation, keep food preparation away from handling vomit or stool, and clean contaminated surfaces. These habits protect caregivers and other children without turning the home into an isolation ward. Ask childcare about its return policy rather than medicating to conceal symptoms for attendance. Rotavirus vaccination is a prevention discussion for later, not treatment for the current diarrhoeal episode.
A good feed or wet nappy is encouraging, but look at what happens next. Renewed vomiting, poorer intake, blood in stool or losses the household cannot keep up with justify renewed medical contact. Bring the ORS wrapper and medicine information if readily available. Success is not measured by how long you managed at home. It is getting hydration right and obtaining help when the child's needs change.
Practical checklist
- Keep the ORS label and measuring container together.
- When calling, start with age, ability to drink and urine changes.
How NIMO built this guide
NIMO writes and localizes each guide for Vietnamese families, then checks key facts against the official references below. The links support the guide; they are not the guide itself.
General health information · Checked against official sourcesFor symptoms or treatment decisions, confirm with an appropriate health professional.Next review · Dec 5, 2026
