Q: My 37-month-old child has repeated high fevers up to 40°C with no cold symptoms. What could it be?

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Question:

My 37-month-old child has been having recurring high fevers since yesterday. Fortunately, my child is eating well and doesn't seem lethargic at all. When the temperature is around 38.5°C, giving a fever reducer brings it down to about 37.5°C. However, once the medication wears off, the fever spikes right back up to 39°C or even 40°C, and this cycle just keeps repeating. My child did catch a cold last week but recovered after taking medication, so there are currently no symptoms like a runny nose or cough. Could this recurring fever still be related to that cold?

Answer:

You must be very worried about your 37-month-old child's recurring high fevers. Fortunately, it is reassuring to hear that your child is still eating well and remains active.

Current Situation Assessment:

• The fever reducer is effective (temperature drops from 38.5°C to 37.5°C).

• The fever spikes back up to 39–40°C once the medication's effect wears off.

• Appetite and energy levels are normal.

• There are no active cold symptoms.

Possible Causes to Consider:

1. Secondary bacterial infection (such as otitis media/ear infection or a urinary tract infection).

2. A new viral infection.

3. In rare cases, Kawasaki disease.

🏥 Please visit a pediatrician for a consultation tomorrow morning, as:

→ The high fever has lasted for 2 or more days.

→ The fever repeatedly reaches 39°C or higher despite taking fever reducers.

→ This is a new pattern of fever following a recent cold.

Care Guide for Tonight:

• You can alternate between Acetaminophen (Tylenol) and Ibuprofen every 4 hours if necessary.

• Provide plenty of hydration – offer water or electrolyte drinks frequently.

• Dress your child in light clothing and maintain a comfortable room temperature between 24–26°C.

⚠️ Go to the Emergency Room immediately if your child:

• Suddenly becomes severely lethargic or unresponsive.

• Develops a new skin rash or red spots.

• Has a significantly reduced urine output.

• Experiences any difficulty breathing.

At 37 months of age, the risk of febrile seizures is relatively low, but a temperature over 40°C can make your child very uncomfortable. Please continue to manage the fever diligently with medication tonight and make sure to see a doctor tomorrow.

For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.

https://fevercoach.us