Q: My 2nd-grade daughter has had a fever for 3 days with no other symptoms and negative flu tests. What tests should we do if it continues?

Medically reviewed by Sang Hyun Ahn, 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 second-grade daughter has had a fever for over two full days. On the first and early second days, her temperature would rise quickly even after taking a fever reducer. Today, however, the interval has lengthened, and her temperature goes back up to about 38°C after 5 to 6 hours. Her highest temperature was 39°C. She has taken three flu tests, and all came back negative. She has absolutely no cold symptoms other than the fever. The pediatrician thinks it might be a simple viral fever, but if she continues to have a fever tomorrow, what additional tests should we do?

Answer:

You must be very worried as your second-grade daughter's fever has lasted for 3 days. It is especially anxiety-inducing when there is only a fever without any other cold symptoms.

Current Status Evaluation:

• The fever pattern is improving (the duration of the fever reducer's effect has increased).

• Three flu tests were negative.

• No other respiratory symptoms are present.

Considerations for additional tests if the fever persists tomorrow:

1. Blood tests (CBC, CRP) - To check for bacterial infection.

2. Urine test - To rule out a urinary tract infection (especially important for girls).

3. Chest X-ray - To check for early-stage pneumonia.

4. COVID-19 test - If you haven't done one yet.

Go to the Emergency Room immediately if you notice:

→ Difficulty breathing, decreased consciousness, or a severe headache.

→ New symptoms like abdominal pain or a rash appear.

→ She has not urinated for over 8 hours.

Home Care:

• Ensure adequate hydration (about one cup per hour).

• Cross-dosing of fever reducers is possible (Acetaminophen/Tylenol and Ibuprofen).

• Dress her in light clothing.

If a high fever persists for 4 days or more, additional testing is absolutely necessary. Please visit the clinic again tomorrow morning, and make sure to take a record of her fever patterns and any new symptoms with you.

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