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Q: My daughter has a fever, chills, and left flank pain after a negative flu test. Should she be retested for the flu?

  • Myeongchan Kim
  • 8 hours ago
  • 2 min read

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 second-grade daughter started having a fever and a sore throat in the evening a couple of days ago. We took her to the clinic for a flu test the next day, but it came back negative. Her inflammation marker was 0.8, and she was prescribed antibiotics. However, she now has chills, complains of pain in her left flank, and has had a fever all night. We are currently alternating two different fever reducers. Should she get another flu test today?


Answer:

It must be very concerning to see your daughter suffering from a continuous fever, sore throat, and now flank pain.


Based on your description, here is an assessment of the current situation:

  • Flu Test Timing: Flu tests are most accurate when done within 24 to 48 hours of symptom onset. Taking the test the day after her symptoms started was the appropriate timing.

  • Inflammation Marker: An inflammation level of 0.8 is generally within the normal range.


⚠️ Symptoms Requiring Attention:

The most concerning new symptom is the left flank pain, as this can sometimes indicate a kidney infection. It is important to monitor if she has any associated urinary symptoms, such as pain while urinating, or changes in the color or smell of her urine.


You should take her back to the doctor today if:

  1. The flank pain persists or worsens.

  2. She develops any urine-related symptoms (changes in frequency, pain, or color).

  3. The fever lasts for 3 or more days.

  4. She experiences chest pain or difficulty breathing.

  5. She has difficulty drinking fluids and staying hydrated.


At this point, identifying the cause of her flank pain is much more important than repeating the flu test. I highly recommend taking her back to the pediatrician for a comprehensive re-evaluation, which should ideally include a urine test.


Home Care Instructions:

  • Ensure she stays well-hydrated (offer warm water or electrolyte drinks).

  • Continue alternating her fever-reducing medications as directed.

  • You can apply a warm compress to her left flank to help soothe the pain.

  • Keep a close record of any changes in her symptoms.


Please consult your pediatrician for an in-person assessment to ensure she gets the proper treatment. Wishing your daughter a speedy recovery!


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






 
 
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