Q: My child's fever dropped but returned to 38.2°C after a negative flu test and a swollen throat. Do we need to test again?

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 child has had a fever ranging from 37.5°C to 38°C since Sunday. We visited the doctor on Monday, where they noted a severely swollen throat but a negative flu test. We started the prescribed medication. The fever seemed to subside, but it returned yesterday evening, peaking at 38.2°C. We are continuing the medication and fever reducers. In this situation, do we need to go back and get tested again?

Answer:

It is completely understandable to be concerned when a fever seems to improve but then returns.

Current Situation Assessment:

• Initial Diagnosis: Swollen throat (likely pharyngitis or tonsillitis)

• Flu Test: Negative

• Fever Pattern: 37.5-38°C → Improved → Returned to 38.2°C

This fluctuating fever pattern is quite common with viral throat infections. Typically, the fever will rise and fall over 3 to 5 days, and the overall illness usually lasts about 5 to 7 days.

When a Retest or Re-evaluation is Necessary:

You should seek further medical evaluation if you notice any of the following:

• The fever becomes higher than the initial onset (39°C or higher).

• The fever persists for more than 5 days.

• New symptoms appear (such as a rash, difficulty breathing, or severe headache).

• There is no improvement after 3 days of taking prescribed antibiotics (if antibiotics were prescribed).

• The child becomes very lethargic or refuses to drink fluids.

Current Recommendations for Care:

For now, you can continue to observe your child at home by doing the following:

• Use fever reducers only when the child is visibly uncomfortable or in pain.

• Ensure they drink plenty of fluids to stay hydrated.

• For throat pain, offer warm water or warm water with honey (Note: Honey should only be given if the child is over 1 year old).

If the fever continues for another day or two without improvement, or if your child's condition worsens, please visit your pediatrician for a follow-up. While most cases resolve without additional testing, a doctor will need to examine your child in person to determine if a blood test or bacterial throat culture is necessary.

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

fevercoach.us

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