There is no fastest way to reduce fever in a one year old baby. Fever is usually associated with acute bronchitis, acute gastroenteritis and other infectious factors, as well as leukemia and other blood disorders, in the fever needs to be removed before the cause of the disease, and then reasonable use of antipyretic drugs, or physical cooling. 1. Infectious factors (1) Acute bronchitis: for bacterial acute bronchitis, oral antibiotics, such as cefixime, ampicillin propofol granules, etc.; for acute bronchitis caused by viral infection, oral ribavirin can be taken. Temperature more than 38.5 degrees, then oral ibuprofen suspension; not more than 38.5 degrees, can be physical cooling, such as drinking water, bath, and so on. (2) Acute gastroenteritis: in the presence of infection, oral anti-infective drugs are needed, and ceftriaxone sodium can be taken orally. Diarrhea can be supplemented with probiotics, such as Bifidobacterium bifidum live bacterial powder. For fever, the temperature is more than 38.5 degrees, oral ibuprofen suspension can be taken, and you can also drink plenty of water to physically cool down the temperature. 2. Non-infectious factors: For example, leukemia, which is a relatively common disease in childhood, is prone to cause non-infectious fever. If repeated fever, the temperature reaches 38.5 degrees, should be oral ibuprofen suspension to reduce fever. Then, platelets should be replenished in time to prevent platelets from dropping continuously. If belongs to acute leukemia, need to be chemotherapy as soon as possible, commonly used drugs are prednisone, cyclophosphamide and so on. In addition, the fever of one-year-old baby may also be related to other factors. About one-year-old baby fever need to pay more attention, more observation, if the fever does not go down for a long time, we should consult the doctor in time to clarify the cause of the disease, and then follow the doctor’s instructions for treatment.