Symptoms of common fever and leukemia fever are not exactly the same, although both can be low or high fever, but in the duration of fever, accompanying symptoms and other aspects are different. 1. Duration: ordinary fever usually lasts for a shorter period of time, mostly in 3~7 days, usually not more than 10 days, and it is not easy to recur after effective anti-infection treatment such as oral levofloxacin capsule; while leukemia fever usually lasts for a longer period of time, and it is not easy to get rid of the fever, and it is very easy to get fever again even after fever subsides. 2. Accompanying symptoms: ordinary fever is accompanied by cough, runny nose, nasal congestion, enlarged tonsils, sore throat and other accompanying symptoms. The accompanying symptoms of leukemia fever are various, including: ① anemia: progressive aggravation; ② secondary infection: it can occur in various parts of the body, with stomatitis, gingivitis, pharyngitis as the most common; ③ bleeding: spontaneous bleeding is common, which can be manifested as skin bleeding spots, gingival oozing, fundus hemorrhage and so on; ④ enlarged lymph nodes and liver and spleen. Ordinary fever can be relieved after the use of antibiotics such as cephalosporins, while leukemia fever often requires high attention, and treatments include chemotherapy (cytarabine, desmethoxylated erythromycin), hematopoietic stem cell transplantation, etc., and should be actively cooperated with the treatment under the guidance of physicians.