Patients with early-stage liver cancer may experience low-grade fevers, primarily due to the following two reasons: First, tumor fever. In the early stages of liver cancer, some tumor cells can release tumor mediators into the bloodstream, affecting the function of the temperature regulation center and causing the patient to develop a fever. This type of tumor fever is usually not very high, remaining below 38.5°C, without concurrent symptoms or signs of infection. A complete blood count typically indicates that the total number of white blood cells and the proportion of neutrophils are not elevated. The second scenario involves patients in the early stages of liver cancer experiencing fever due to concurrent infections. These patients often present with symptoms and signs related to infection, such as coughing up phlegm, abdominal pain and diarrhea, and urinary frequency, urgency, or pain. The proportion of white blood cells and neutrophils is significantly increased in these cases.