There are many reasons why children always have fever, such as bacterial infection, viral infection, leukemia, etc. Physical cooling or oral antipyretic drugs are often used to alleviate the symptoms, and it is also important to treat the cause of the disease. Regardless of the cause of the child’s fever, when the body temperature <38.5 ℃, can use warm water to wipe the forehead, armpits, thighs and other places for physical cooling, part of the child's temperature can be gradually reduced to normal, when the body temperature ≥ 38.5 ℃ can be used in accordance with the medical advice of the use of ibuprofen and other antipyretic drugs. At the same time, the cause of the disease needs to be treated. 1. bacterial infection: when bacterial infection caused by respiratory symptoms, the baby can appear fever symptoms, this time under the guidance of the doctor need to choose the appropriate antibiotics, such as cefixime and other drugs. 2. Viral infections: such as influenza virus, can also make the child appear recurrent fever phenomenon, at this time can choose oseltamivir for treatment. 3. Leukemia: can also make the child appear always fever symptoms, this time a clear diagnosis of the need to follow the doctor's instructions to standardize chemotherapy, commonly used drugs are vincristine, Zoerythromycin, Mentholatum enzyme, prednisone and so on. All of the above drugs should be used under the guidance of the doctor, avoid self-medication. If a child always has a fever, it is recommended to go to the hospital in time for examination, to clarify the cause of the disease, and active treatment.