It is true that high temperatures can kill cancer cells, and cancer tissue cells are more intolerant of high temperatures than normal cells. However, it is prohibited to use high temperatures to kill cancer cells in tissues. Cancer cells become less active in an environment of about 42°C, thus inhibiting their growth. High temperature kills cancer cells in three ways. First, it causes damage to the cell membrane, increasing the permeability of the cell membrane and leading to cell death. Secondly, it causes damage to cell proteins, the DNA transcription process of cancer cells is blocked, and cancer cells lose the ability to reproduce and die. Thirdly, it causes damage to lysosomes in the cell plasma, and the digestive enzymes released after its disintegration cause the final death of the cell. The eradication of cancer is the greatest expectation of patients, but they also need to face up to cancer. For some special treatments may be effective, but the use of high fever, sauna, etc. may not only not let the cancer cells die, but also bring negative effects to the body. Patients can undergo regular medical checkups to keep abreast of the development of their condition, follow the advice of specialists, standardize their treatment, and have regular follow-ups.