Q: My 29-month-old child has had a high fever for 3 days. Should we go to the ER now or wait until tomorrow? Is a flu test still possible after 48 hours?

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Question:

Hello doctor. My 29-month-old child started getting a fever around midnight on Friday, reaching 39.1°C by early morning. After taking a fever reducer, it went down to a mild fever for about half a day. We visited a clinic, and the doctor said a flu test wasn't necessary yet. They noted swelling in the throat and nose, so we received antibiotics and symptom relief medications.

Since then, the fever has persisted between 38.3°C and 39.5°C despite taking the medication, though fever reducers do lower it slightly. Early this morning, the fever hit 39.3°C, but dropped back to normal after a fever reducer. I debated going to another clinic today, but since my child's overall condition and energy levels are so good, I decided against it. However, the fever is rising again (currently 38.6°C).

My child isn't lethargic, and though their appetite has decreased, I am still managing to feed them small amounts. Should I rush to an open clinic or the ER for testing right now, or is it okay to manage the fever at home and visit the doctor tomorrow morning? Also, if the fever doesn't break, should we get a flu test? It's been over 48 hours since the fever started—is it still okay to get tested?

Answer:

Hello. You must be very worried as your 29-month-old child has had a high fever persisting for three days.

Current Situation Assessment:

• Fever started at midnight on Friday (approximately 72 hours have passed)

• Fever fluctuating between 38.3°C and 39.5°C, but responds to fever reducers

• Overall condition is good, and the child is able to eat

• Currently taking antibiotics

Given the current situation, visiting the clinic tomorrow morning seems appropriate.

【When to visit the ER immediately】

→ Fever of 40°C or higher that persists

→ Difficulty breathing or chest retractions (chest pulling in)

→ Decreased consciousness or lack of response

→ No urination for more than 8 hours

→ Sudden appearance of a rash

【Things to check at the clinic tomorrow】

1. Flu test - Testing is still possible and effective even after 48 hours.

2. Blood test - Necessary if a high fever lasts for more than 3 days.

3. Chest auscultation - To check for pneumonia.

4. Urine test - To rule out a urinary tract infection (UTI).

Tonight's Management:

• Cross-dosing fever reducers (Alternate Acetaminophen and Ibuprofen every 3-4 hours if necessary)

• Provide hydration frequently in small amounts (every 10-15 minutes)

• Dress the child in light clothing and maintain a room temperature of 24-26°C

• Keep a written record of the fever times and temperatures

A high fever lasting for more than 3 days may indicate the flu or a bacterial infection rather than a simple cold, so an accurate diagnosis is necessary. If your child's condition remains good, a clinic visit tomorrow morning is sufficient. However, if their condition worsens during the night, please go 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.

https://fevercoach.us