Q: My 40-day-old baby has a fever of 38°C. Should I go to the ER and can I give them fever medication?
Medically reviewed by Sang Hyun Ahn, MD
Content edited by Myeongchan Kim, MD
This post is a dramatization of a question and answer session experienced by our actual medical reviewers. Please note that this content is for informational purposes only and does not constitute medical advice. Always consult with a qualified healthcare professional for any health concerns or before making any decisions related to your health or treatment.
Question:
My baby is 40 days old, and their temperature has gone up to 38.0°C (100.4°F). Should I take my baby to the emergency room? Also, is it safe to give them a fever-reducing medication at this age?
Answer:
If a baby under 3 months of age (like your 40-day-old infant) develops a fever of 38.0°C (100.4°F) or higher, they require immediate medical attention. You should take your baby to the emergency room or be seen by a doctor right away.
What you should do right now:
• Dress the baby in light, breathable clothing and continue attempting to feed them (breast milk or formula).
• Do NOT give any fever-reducing medication. Giving fever medicine to a baby this young should only be done if specifically instructed by a doctor after a full clinical evaluation.
• Keep a written record of your baby's body temperature, feeding amounts, and the number of wet diapers (urination frequency) to share with the medical staff.
Why immediate medical care is necessary:
For infants in this age group, a fever can be the only sign of a potentially serious, underlying infection. Because their immune systems are still immature, conditions can escalate quickly and are easy to miss without proper testing. A doctor must physically examine the baby and potentially run tests to accurately determine the cause of the fever. Please proceed to the nearest emergency room or pediatric urgent care for an immediate in-person evaluation.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
