Q: My 6-year-old had a high fever and vomited, but her temperature is normal now. Does she still need a flu test?
- Myeongchan Kim
- 6 hours ago
- 3 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:
Hello, I have a 6-year-old daughter who weighs 16 kg. Yesterday morning, she started with a mild fever of 37.6–37.7°C, which went up to 38°C, so I gave her ibuprofen. She had a slight cough and a stuffy nose. We went to the clinic in the afternoon, but the doctor said her symptoms were vague and advised us to monitor her at home and return the next morning if she got worse.
However, after we got home, her fever spiked to 39°C. Even with cross-dosing fever reducers, her temperature stayed around 38.6–38.7°C until past midnight. She vomited in the late afternoon, couldn't eat anything, and seemed very lethargic. Suddenly, around 1:00 AM, her condition seemed to improve, and by 2:00 AM, her temperature was back to a normal 37°C. Since her fever broke, does she still need to get a flu test at the clinic this morning?
(Note to other parents reading: I wanted to add an update. I thought the fever was gone, but it spiked again to 39.9°C at 5:00 AM. We went to the clinic at 9:30 AM—about 24 hours after the initial mild fever started—and did a flu test. She tested positive for Influenza A. She received IV fluids and fever-reducing IV medications. The vomiting was just from the high fever, not a stomach bug. Now her fever is staying in the low 37°C range, and she is successfully eating bland food and drinking fluids!)
Answer:
Hello. It sounds like your 6-year-old went through a very difficult time with high fever and vomiting. You must have been very worried as a parent. Based on your timeline, here is an evaluation of the situation and why proceeding with the flu test was the absolutely right decision.
Evaluating the Clinical Picture:
Fever escalated from the mid-37°C range to 39°C within a day.
The fever remained in the 38°C range despite cross-dosing fever-reducing medications.
Symptoms included vomiting, loss of appetite, and extreme lethargy.
There was only a temporary improvement and normalization of body temperature in the middle of the night before spiking again.
Why a Flu Test is Highly Recommended in This Scenario:
Even if a fever seems to temporarily drop, getting evaluated for the flu is strongly advised under these circumstances:
Optimal Timing: The best time for an accurate flu test is 24 to 48 hours after the initial onset of the fever.
Suspicious Symptoms: The combination of a high fever, vomiting, and lethargy are classic indicators of a potential flu infection in children.
Treatment Options: If the test is positive (as it was in your case), antiviral medications like Tamiflu or IV treatments can be administered to significantly shorten the duration of the illness and ease the symptoms.
When to Seek Immediate Medical Attention:
For future reference, please bring your child to the hospital immediately if they experience any of the following "red flag" symptoms:
A fever persistently staying at or above 40°C.
Continuous or repeated vomiting that makes it impossible to keep oral fluids down (risk of severe dehydration).
Decreased consciousness, extreme confusion, or seizures.
Difficulty breathing or chest pain.
Home Care Guidelines for Flu and Fever:
Fever Reducers: Ensure you are giving the exact dosage based on your child's weight (For a 16kg child: Acetaminophen 5ml, Ibuprofen 4ml).
Hydration: Offer small amounts of oral rehydration solutions or water frequently to prevent dehydration, especially after vomiting.
Comfort: Dress the child in light, breathable clothing and maintain a cool, comfortable room environment.
As your update beautifully illustrates, early detection and treatment of the flu are crucial for a child's recovery. We are very glad to hear you followed up with your pediatrician exactly at the 24-hour mark, received the proper diagnosis, and that your daughter is on the mend. Please continue to monitor her at home and consult your doctor if any new symptoms arise.
For extra peace of mind and clear guidance when tracking your child's symptoms, the FeverCoach app is always there to help.
