Intermittent fever is usually called wavy fever, also known as flaccid fever, is a sudden increase in body temperature to more than 39°C, which is maintained for a few hours and then decreases to normal, and then suddenly increases again after maintaining a normal baseline level for a few hours, reciprocating for a day or even a few days or even a longer period of time. The following treatments are usually needed: 1. To find the cause of the intermittent fever, usually malaria, measles, leptospirosis, epidemic hemorrhagic fever and other infectious diseases, the cause must be treated. 2. For example, for respiratory tract infections, a combination of cephalosporins and antiviral drugs can be used. 5. In addition, when the body temperature is above 39°C, non-steroidal anti-inflammatory drugs can be used for symptomatic treatment. 6. At this time, the patient must be kept warm, physical cooling must be given, and adequate rehydration must be provided.