Fever in Newborn: Causes, Symptoms, Temperature and When to Seek Medical Help
A newborn’s health needs special attention, especially during the first few weeks after birth. If your baby feels unusually warm, is feeding less than usual or seems sleepier than normal, you may wonder whether your newborn has a fever. Fever in a newborn can be a sign of a serious infection and requires urgent medical assessment. A temperature of 38°C (100.4°F) or higher in a baby younger than three months needs immediate medical attention, even if the baby otherwise appears well. Do not wait for other symptoms to develop. In this guide, we explain the signs of fever in newborn, possible causes, how to check your baby’s temperature and when to seek medical help. What Is Considered a Fever in Newborn? A fever is an increase in body temperature that can occur when the body responds to an infection or another medical condition. For a baby younger than three months, a temperature of 38°C (100.4°F) or higher is a medical concern that requires urgent assessment. A newborn may have a serious infection without showing obvious symptoms, so parents should not rely only on how the baby looks or feels. If you suspect your newborn has a fever, contact a healthcare professional immediately or take your baby to the nearest hospital emergency department. Do not delay medical care to repeat measurements or try home remedies. Common Symptoms of Fever in Newborn A newborn with a fever may show one or more of the following signs: Warm skin: Your baby’s body may feel warmer than usual. Poor feeding: The baby may refuse feeds or feed less than usual. Unusual sleepiness: Your baby may be less active or difficult to wake. Irritability: The baby may cry more than usual or be difficult to settle. Changes in breathing: Breathing may become faster or more difficult. Reduced urine output: Wet nappies may become less frequent. Changes in skin colour: The skin may appear unusually pale, grey, mottled or blue. Not every newborn with an infection develops a high temperature. Some babies may have a temperature that is lower than normal or may simply appear unwell. Seek emergency medical help immediately if your baby is difficult to wake, has trouble breathing, develops blue or grey lips or skin, has a seizure or develops a rash that does not fade when pressed. What Causes Fever in Newborn? Several conditions can cause a newborn’s temperature to rise. The cause cannot be determined reliably from temperature alone, and a doctor may need to examine the baby and perform tests. 1. Viral Infections Viruses can cause infections that lead to fever. Some may also cause a runny nose, cough, feeding difficulties or changes in activity. 2. Bacterial Infections Bacterial infections are an important concern in newborns. Possible causes include urinary tract infections, pneumonia and bloodstream infections. 3. Serious Infections Conditions such as sepsis and meningitis can cause fever or other temperature abnormalities in newborns. These illnesses can progress quickly and need urgent medical assessment. 4. Fever After Vaccination Some babies develop a temperature after receiving vaccinations. However, a fever in a baby younger than three months should not automatically be assumed to be a normal vaccine reaction. Contact a healthcare professional promptly and follow their advice. 5. Overheating Too many layers of clothing, heavy blankets or a very warm environment can make a baby feel hot. However, overheating should not be assumed to be the cause of a measured fever. A temperature of 38°C or higher in a newborn still requires urgent medical assessment. How to Check a Newborn’s Temperature If your newborn feels warm or appears unwell, use a suitable digital thermometer rather than relying on touch alone. Follow these steps: Choose a digital thermometer suitable for your baby’s age. Follow the manufacturer’s instructions for the recommended measurement site. Record the temperature and the time it was taken. Tell the healthcare professional the reading and how you measured it. Seek urgent medical care if your baby is younger than three months and has a temperature of 38°C or higher. The NHS recommends measuring a young child’s temperature with a digital thermometer in the armpit. Some other clinical guidelines use different measurement methods, so follow professional advice on the most appropriate method for your newborn. Do not use an ear thermometer for a very young baby unless specifically advised by a healthcare professional. What Should Parents Do If a Newborn Has a Fever? If your newborn has a fever, take the following steps while arranging medical care. Seek urgent medical assessment: Do not wait to see whether the fever goes away. Continue offering feeds if your baby is awake and able to feed: Breast milk or the baby’s usual prescribed feeding plan can help maintain intake. Do not force-feed a baby who is struggling to feed. Dress your baby comfortably: Avoid excessive layers and heavy blankets, but do not deliberately make the baby cold. Monitor your baby’s condition: Note feeding, wet nappies, breathing, alertness and temperature. Avoid self-medication: Do not give paracetamol, ibuprofen, antibiotics or other medicines to a newborn unless a healthcare professional specifically directs you to do so. Never give aspirin to a child. Do not use cold baths, ice, alcohol rubs or home remedies to bring down a newborn’s temperature. These measures do not treat the underlying cause and may be harmful. When Should You Take a Newborn to the Hospital? A newborn needs immediate medical assessment if: If the baby is younger than three months and has a temperature of 38°C (100.4°F) or higher. The baby has a temperature below 36°C and appears unwell. The baby refuses feeds or has significantly fewer wet nappies. The baby is unusually sleepy, floppy or difficult to wake. The baby has fast or laboured breathing. The baby develops blue, grey, pale or mottled skin. The baby has a seizure or a rash that does not fade when pressed. If your baby has severe breathing difficulty, is unresponsive or has blue lips, call your local emergency service immediately. How Can Parents […]









