When a 5-month-old baby develops an initial fever, the child needs to be checked for routine blood tests to clarify the cause of the fever, and then the temperature needs to be taken urgently to avoid a temperature above 38.5 degrees. If the body temperature is below 38.5 degrees, you can first use Chinese medicine to reduce the fever. If there is a fever caused by cold, you can use pediatric aminophenol xuanamin granules, pediatric aminophenol pseudohemp dispersible tablets, pediatric cold and fever clearing granules, pediatric black bean and chiao clearing granules to treat the child, which has the effect of treating the cold as well as relieving the mild fever. If the fever is high, above 38.5 degrees, oral ibuprofen suspension needs to be taken immediately to reduce the fever, so as to avoid the phenomenon of febrile convulsions, which may cause irreversible damage to the child’s brain cells and brain function. You can put a fever-reducing patch on the child’s forehead, or apply a cold towel, which can reduce the increase in head temperature, and is also more effective in relieving brain damage. It is most important to find the cause of the fever and treat it accordingly.