What is the reason behind a newborn's fever when the cause cannot be identified?

Patient's question:

At three months, the child did not eat well (no breast milk). When the child was five months old, they started having fever, and their appetite became even worse. The fever usually occurred in the afternoon, sometimes at night, with temperatures around 38.5–38.9°C. Fever in the morning was relatively rare.

Doctor's answer:

Generally, fever is a defensive response. If the body temperature is below 38.5 degrees, there is no need for antipyretic treatment. Rest, keep warm, and drink plenty of warm water. If the body temperature is above 38.5 degrees, you can take ibuprofen or acetaminophen for symptomatic treatment, and physical cooling methods can also be applied.
There are many causes of respiratory diseases in children. If a child is diagnosed with a respiratory condition, parents need to cooperate with the doctor in active treatment, assist with gastrointestinal decompression, and develop good hygiene habits. Parents should pay attention not to let their children develop picky eating habits and maintain a balanced diet.

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