Q: My baby's fever keeps going up to 40°C (104°F). Should we go to the emergency room right now?
- Myeongchan Kim, MD
- Jun 8
- 2 min read
Updated: Jul 8
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 has a continuous high fever, and I am wondering if we should go to the emergency room right now. I have been monitoring the temperature since 9 PM, and it has fluctuated from 39°C (102.2°F) down to 38.5°C (101.3°F), and then back up to 40°C (104°F). My baby doesn't seem severely lethargic right now but is struggling to sleep properly due to the fever. I am currently giving a tepid water massage. I am very worried and want to know if going to the ER immediately is the right step.
Answer:
It is completely understandable that you are very worried about your baby's continuous high fever.
Current Situation Evaluation:
Fever up to 40°C (104°F): Requires active fever management.
Not lethargic: This is a reassuring sign and indicates the situation is likely not an immediate emergency.
Difficulty sleeping: The fever is causing discomfort that needs to be addressed.
Immediate Steps to Take at Home:
Administer Antipyretics: Give an age- and weight-appropriate dose of acetaminophen or ibuprofen.
Dress Lightly: Dress your baby in lightweight, breathable clothing (e.g., just a diaper/underwear and a single thin layer of clothing).
Hydration: Offer cool water or fluids frequently (a few sips every 5 to 10 minutes).
Room Temperature: Keep the indoor temperature comfortable, ideally around 24–26°C (75–78°F).
⚠️ Note on Tepid Water Massages: According to the latest medical guidelines, tepid water massaging is generally not recommended. It can cause the baby to shiver, which can actually raise their internal body temperature, and it can cause unnecessary crying and discomfort. It is not as effective as fever-reducing medications.
When to Go to the Emergency Room Immediately:
Please head to the ER right away if you observe any of the following:
The baby is under 3 months of age.
Loss of consciousness, extreme drowsiness, or lack of response to you.
Difficulty breathing or working hard to breathe.
Seizures or convulsions.
A rash of purple spots (petechiae) that does not fade when pressed.
A stiff neck.
For now, administer the fever-reducing medication and observe your baby closely for about an hour. If the fever begins to come down, the baby remains alert, and none of the emergency symptoms listed above are present, it is safe to monitor them at home through the night. Please visit your pediatrician tomorrow morning for a proper evaluation to determine the underlying cause of the fever. If any danger signs develop, proceed to the emergency room immediately.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
