Cancer is the collective name of malignant tumor. Cancer patients in advanced stage can cause various clinical symptoms due to metastasis of multiple organs and tumor consumption, which are mainly as follows: 1. Pain: This is a common clinical manifestation in advanced stage of cancer. 3.Multi-organ failure: Due to the metastasis of multiple organs in the late stage of cancer, such as lung, heart, kidney, cranial and cerebral parts, it can cause the failure of multiple organs, such as respiratory failure, heart failure, acute renal impairment, etc.