Fever in Babies and Children: When to Worry
Common illnesses · 6 min read · Reviewed by the SPAN pediatric team
Fever is one of the most common reasons parents bring a child to the doctor. A fever itself is not an illness — it is the body's natural response to infection. What matters most is how your child looks and behaves, and their age.
What counts as a fever?
A fever is a body temperature of 100.4°F (38°C) or higher. A digital thermometer gives the most reliable reading. In babies under 3 months, an armpit or rectal reading is preferred over the forehead.
Age changes everything
The younger the baby, the more cautious you should be. A fever in a very young baby can be the only sign of a serious infection, even when the baby otherwise looks well.
- Under 3 months: any fever of 100.4°F (38°C) or above needs a doctor the same day.
- 3–6 months: see a doctor if the fever is high or the baby seems unwell.
- Older children: watch how they look and behave more than the number on the thermometer.
How to help your child at home
Comfort matters more than chasing a 'normal' number. Keep your child hydrated with frequent small drinks, dress them lightly, and let them rest.
Paracetamol (and ibuprofen for older infants) can be used for discomfort at the correct weight-based dose. Never give aspirin to children. If you are unsure of the dose, call us.
- Offer fluids often — breast milk, formula, water or ORS.
- Do not over-bundle; a light layer is enough.
- Avoid cold-water sponging or ice — it causes shivering and distress.
Seek care immediately if your child
- Is under 3 months with any fever
- Is difficult to wake, floppy, or unusually drowsy
- Has trouble breathing, fast breathing, or blue lips
- Has a rash that does not fade when pressed
- Has a fit (convulsion), a stiff neck, or persistent vomiting
- Is not passing urine / has no wet nappies, or has a fever lasting more than 5 days
Frequently asked questions
Is a high temperature more dangerous than a low one?
Not necessarily. How your child looks and behaves is more important than the exact number. A child who is alert and drinking is usually reassuring, even with a higher reading.
Should I alternate paracetamol and ibuprofen?
Use a single medicine at the correct dose for comfort. Alternating is sometimes advised by a doctor, but should not be done routinely without guidance.
When is a febrile fit an emergency?
Call for help if a convulsion lasts more than 5 minutes, if your child does not recover well afterwards, or if it is their first fit. Any fit with fever should be reviewed by a doctor.
Note: This guide is general information for parents and does not replace a consultation. For advice specific to your child, please see a doctor. In an emergency, call SPAN Hospital at +91 217 2313300.