Liver cancer fever is not an aggravation of the disease, it may be caused by infection or cancer fever, which can be reduced by cooling down and taking medicine. 1. Tumor fever: all kinds of malignant tumors may cause fever, which is mainly due to the body absorbing tumor necrotic material and generating heat, leading to the increase of body temperature, usually causing low fever, which can be reduced by physical cooling (alcohol wipe, warm water cooling, etc.), taking antipyretic drugs (such as ibuprofen, acetaminophen) and other methods. 2. Infection: Liver cancer can lead to a decrease in immunity, which can cause bacterial, viral and fungal infections, etc. Blood routine, white blood cell, neutrophil count and other tests should be carried out first to determine the specific source of infection, and then sensitive drugs should be selected for treatment. It is recommended to go to the hospital to find out the cause of liver cancer and then treat the symptoms and use drugs under the guidance of doctor.