Fever in late stage of cancer is not a good situation, it may be caused by the progression of the disease with inflammatory infection. Most of the fevers caused by such inflammatory infection are high fever, such as body temperature higher than 38.5℃ or 39℃, which can be treated with anti-inflammatory drugs at the same time as anti-tumor treatment will improve the symptoms. On the other hand, tumor fever may appear in the late stage of cancer when tumor necrotic material is absorbed, most of this kind of fever is low around 38℃, and it is not obviously improved by anti-inflammatory treatment, so you can consider using other Chinese medicine to clear heat and detoxify, such as oral treatment with Xinhuang tablet to relieve this kind of fever. There is no way to reverse the condition of cancer to middle or late stage, only to try to reduce the pain and prolong the survival treatment, and to deal with any problems symptomatically.