Conceptually, it is 1. The heat leakage temperature is above 39℃ ~ 40℃ for several days or weeks, and the 24-hour fluctuation range does not exceed 65438 0℃. It can be seen in the extreme period of fever such as pneumococcal pneumonia, typhoid fever and typhus. 2. Relaxed hot body temperature is above 39℃, but it fluctuates greatly. Within 24 hours, the body temperature difference is above 2℃, and the lowest temperature is generally higher than the normal level. Common in septicemia, rheumatic fever, severe pulmonary tuberculosis, suppurative inflammation and so on. 3. High fever and high fever interval appear alternately, and the fluctuation range of body temperature can reach several degrees. Dehydration period (intermittent period) can last 1 day to several days, with repeated attacks. Found in malaria and acute pyelonephritis. 4. The body temperature of relapsing fever suddenly rises above 39℃, and then suddenly drops to the normal level after a few days. After a few days, the high fever period and non-fever period alternate regularly. It is found in relapsing fever, Hodgkin's disease and periodic fever. 5. The body temperature of wave fever gradually rises above 39℃, then gradually drops to the normal level after a few days, and then rises gradually after a few days, and so on for many times. Found in brucellosis. 6. Irregular heat is irregular, which can be seen in tuberculosis, rheumatic fever, bronchopneumonia, exudative pleurisy and infective endocarditis.