Why does the child's fever come and go?

Patient's question:

What are the reasons for a child's high fever that doesn't go down? Urgent. The child has a fever of 38 degrees, and after receiving an intravenous drip, the temperature returned to normal. 12 hours later, it rose to 39 degrees.
Treatment history and effectiveness: Received treatment three times, including intravenous drips and fever-reducing medication.
What kind of help is needed: How to return to normal body temperature, what methods are available.

Doctor's answer:

After a baby has a fever, the temperature usually fluctuates up and down for about three days. Most children get fevers due to viral infections, and it is normal for them to have 5-6 high fevers throughout the year. Frequent minor illnesses can strengthen a child's immunity, which is beneficial for them.
Advice: When a baby has a fever, if the temperature is between 37-38°C, simply giving them some water is sufficient. If the temperature is between 38-39°C, a warm bath or other physical methods (such as adding or removing clothes in winter) can help lower it. If the temperature is above 39°C, it is necessary to use children's fever-reducing medicine (such as ibuprofen suspension) orally to prevent further convulsions. Generally, repeated fever can return to normal after about 3 days.

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