If the child has recurrent fever but the blood test is normal, it is considered to be caused by viral infection. At present, the weather is changing abnormally and influenza is prevalent, and the infection is more often caused by influenza. If there is no runny nose, sneezing and coughing and other symptoms, the diagnosis of high fever repeatedly appears as influenza, you can apply anti-influenza drugs, such as oseltamivir, under the guidance of a doctor for treatment. When the body temperature is higher than 38.5℃, you need to add anti-fever medication. For children, you can use Merlin or ibuprofen suspension to reduce fever, and drink more water, eat fresh vegetables and fruits, and don’t eat too much spicy and stimulating food.