Why does a 3-year-old child with a fever for 5 days have inflammation in the blood, but the tests cannot identify which one?

Patient's question:

No

Doctor's answer:

Hello, considering the possibility of a cold, it is common to have symptoms such as coughing, phlegm production, and fever. The measured temperature does not need to be adjusted by 0.5 degrees; if it exceeds 37 degrees, it is considered a fever. You can use pediatric paracetamol and chuanxindan granules for treatment. Drink plenty of water, pay attention to keeping warm, and if necessary, intravenous fluids can be used for treatment.