The child has recurrent fever at night for 4 days, if the mental state is relatively good, the diet is good, and the urine and feces are normal. You can drink more water, pay attention to rest, supplement vitamin C, to prevent cross-infection. Pay attention to check the blood routine, through the blood analysis to determine the pathogen of infection, if the peripheral white blood cell count is normal or low, neutrophils are low, lymphocytes are elevated, most of them are caused by viral infections, and can be given antiviral drugs for symptomatic treatment. If the peripheral white blood cell count is elevated and the neutrophil count is elevated, most of the fever is caused by bacterial infection, and antibiotic drugs can be used for symptomatic treatment, such as penicillin and cephalosporin. If the temperature exceeds 38.5 degrees, you can take oral acetaminophen or ibuprofen suspension drops, can quickly play a rapid role in reducing fever. Oral Chinese medicines, such as Pu Di Lan Anti-inflammatory Oral Liquid, can also be taken to remove heat and toxins. If your child has other symptoms in addition to fever, you need to seek medical attention.