There is no fastest and most effective way and measure to reduce fever caused by high white blood cells and viral infections, and treatment needs to be based on the cause of the disease. High white blood cells are usually considered to be caused by bacterial infections, such as respiratory tract infections, urinary tract infections, abdominal infections and so on. Cefixime, amoxicillin and other antibacterial drugs can be applied according to the condition under the guidance of the doctor, and the seriousness of the condition needs to be combined with intravenous drip antibacterial drugs. There are many kinds of viral infections, such as influenza virus infection (influenza A or influenza B, etc.), herpes virus infection, rotavirus infection and so on. Influenza can be treated with oseltamivir phosphate granules, and herpes virus infections can be treated with drugs such as acyclovir and ribavirin. Clinically, high white blood cell or viral infection alone does not determine the medication and treatment plan, but requires the physician to combine the symptoms, physician’s examination, as well as other auxiliary examinations to determine the cause of the disease. If the body temperature is greater than 38.5 ℃ or more can be oral ibuprofen granules, with physical cooling methods to treat the symptoms, in the cause of the disease is not clearly diagnosed, do not indiscriminate use of drugs. Need to go to the hospital to diagnose the cause of fever, in order to carry out targeted treatment and medication.