Low fever caused by leukemia usually does not subside by itself, and it needs to receive regular treatment to improve the symptoms. 1. Due to abnormal hematopoietic function and decreased immunity, leukemia patients are prone to infections in various organs and tissues of the whole body, such as pneumonia, tonsillitis, pharyngitis, stomatitis, etc. These infections are prone to cause fever, which can be treated with antibiotics as early as possible, such as levofloxacin and so on. Patients with pharyngitis and stomatitis can use drugs such as fluconazole and itraconazole. 2. Leukemia patients due to long-term repeated chemotherapy, will cause a large number of white blood cell death, resulting in a sharp decline in the body’s immune function, which is prone to trigger fever, this type of fever usually lasts below 38 ℃, the use of antipyretic drugs is difficult to control. Symptoms may improve when the disease reaches remission. Common chemotherapeutic drugs include cytarabine and Zoerythromycin. If leukemia patients have symptoms of low fever, they should consult the doctor in time to clarify the cause of the disease and under the guidance of the doctor. All of the above medications should be used under the guidance of a doctor, avoid self-medication.