Pediatric fever is a self-protection mechanism of the organism, a symptom to fight against the disease by mobilizing the whole body immune system. For patients with a temperature of 38.5°C or less, if they are in good spirits, they can be physically cooled down without the use of antipyretics. For patients with temperatures above 38.5°C, antipyretics are applied. High fever persists, if a single drug to reduce fever is not good, you can alternate the application of acetaminophen granules and ibuprofen suspension, feed more water, with physical cooling. Fever after cold is mostly viral infection, a few can be mixed with bacterial infection, if there is recurrent fever, the duration of the disease is more than three days, instead of just reducing the fever, we should actively find out the cause of the disease, laboratory blood test + CRP, preliminary determination of pathogenesis, active treatment of primary diseases, while avoiding exacerbation of the disease and the abuse of antibiotics.