Hyperthermia refers to a body temperature of more than 39 degrees in the armpit and is called high fever. High fever has an effect on the body and needs to be reduced in time. If the fever is at home, physical cooling should be carried out in a timely manner, and for children who are prone to convulsions, additional fever-reducing patches should be used for treatment. If the fever is caused by an upper respiratory tract infection, anti-inflammatory drugs should be given appropriately, antiviral drugs should be given early, and antiviral drugs and antibiotics should be given to treat combined bacterial infections. In case of long-term unexplained high fever, attention should be paid to tuberculosis or unexplained connective tissue diseases, such as polyarteritis nodosa, atypical rheumatic fever, lupus erythematosus, etc. In terms of blood diseases, attention should be paid to lymphoma, multiple myeloma, acute non-lymphoid leukemia, etc. All of these should be promptly examined for identification. All of them should be examined and identified in time. In short, no matter long-term or short-term hyperthermia, there may be organic diseases, and some are serious diseases, so when you encounter this situation, you should pay attention to it, and if necessary, promptly consult a doctor for examination and differential treatment.