Leukemia patients do experience fever, which can be categorized into two main types: infectious fever and tumor fever. Infectious fever occurs due to the compromised resistance and lowered immunity of leukemia patients, potentially leading to various types of infections such as pulmonary infections, skin and mucous membrane infections, digestive system infections, urinary system infections, etc. Tumor fever, on the other hand, occurs in the late stages of leukemia and is caused by the abnormal proliferation of leukemia cells, leading to tumor-related fever. Typically, the temperature in tumor fever does not exceed 38 degrees Celsius, with early-stage fevers responding well to treatment, but late-stage fevers showing poorer responsiveness.