Radiotherapy for advanced malignant tumors is still effective and can kill tumor cells. However, as the disease progresses, the physical condition gradually declines, and the patient’s own tolerance for radiotherapy decreases, some of which cannot be selected for radiotherapy treatment. Radiotherapy is mainly to kill the tumor through rays, and it is a common solution for palliative treatment of tumors as well as for killing the remaining cells after surgery. When the malignant tumor enters into the advanced stage, the tumor has obvious influence on the surrounding tissues or has distant metastasis, radiotherapy can kill the tumor cells, which is also effective in controlling and treating the disease. However, after some patients have reached the advanced stage, their physical condition has obviously declined, and in addition to killing tumor cells during radiotherapy, it will also have an effect on normal body cells, especially on white blood cells, and the patient’s body can not withstand the side effects of radiotherapy, so basically the clinic does not choose to deal with radiotherapy. If you feel sick, you should go to the hospital in time and consult your physician.