Cancer is a generic term for malignant tumors, and cancer has a great impact on the body. Patients with advanced cancer are suffering from a series of complications due to the spread and metastasis of lesions, which seriously damage the functions of tissues and organs of the body and greatly increase patients’ pain. Pain is a common clinical manifestation of advanced cancer patients, which seriously affects sleep and diet. Fever is also a common clinical manifestation, and fever can cause great discomfort to patients. Due to loss of appetite, anemia and the failure of multiple organs in the body, the quality of life is extremely reduced.