There are many reasons that can lead to recurrent high fever, such as lung abscess, liver abscess, severe pneumonia, rheumatic immune system diseases, malignant tumors and so on. If the old man has recurrent high fever, it is recommended to actively seek medical treatment, complete relevant examinations, clarify the diagnosis, and take targeted treatment according to the diagnosis. If the patient is due to malignant tumors and fever, according to the condition of the patient to consider whether there are indications for surgery, if there are indications for surgery, you can consider surgical treatment. If the patient is due to liver abscess with recurrent fever, we can consider the conservative treatment of internal medicine or surgical drainage surgery. If the patient has recurrent high fever due to lung abscess, antibiotics can be given, and if antibiotic treatment is ineffective, bronchoscopic intervention or surgical treatment can be considered.