1.There is no need to avoid eating during the treatment, patients should take more high vitamin and high protein diet to enhance nutrition and cooperate with radiotherapy. 2, should keep the irradiated area skin clean, avoid sunlight, friction or mechanical trauma, do not abuse acid, alkaline, iodine, ointment and other drugs, found that the irradiated skin ulcerated to find a doctor to deal with. The marker line of the irradiated field must be clearly visible; the skin can be washed with water every day, it is strictly forbidden to wash with soap to prevent the marker line from washing off, if it is slightly blurred, you should find a doctor to redraw it with special ink, never take the initiative to draw it by yourself or your family members to avoid mistakes or inaccuracy of the treatment site. 3, general patients can successfully complete the entire radiation therapy process, some patients with poor health, even if they can no longer receive surgery or chemotherapy, but can also complete radiation therapy. The systemic reactions of patients in the course of radiotherapy are generally mild, because of different irradiation sites and volume doses, coupled with physical differences, each patient has different reactions to treatment, a few patients have slight weakness, poor appetite or nausea, and a few other patients have decreased white blood cells; the latter patients are mainly due to bone marrow suppression after chemotherapy or large area radiotherapy, which will be recovered soon after the use of leukocyte-raising drugs. The latter group of patients is mainly caused by bone marrow suppression after chemotherapy or large area radiotherapy, which will recover soon after using leukocyte-raising drugs. 4.The degree of local radiation reaction is related to the size of the irradiated area, the dose level and the presence of other lesions in the tissues and organs. In general, for brain tumor patients, hair may fall out at the irradiated area after head irradiation, but after the end of treatment, hair will generally grow out soon; after irradiation of face and neck, there may be dry mouth; after irradiation of chest at a certain dose, pain when swallowing occurs, which is generally tolerable and can continue irradiation, and the pain disappears soon after the end of irradiation; diarrhea occurs after abdominal irradiation, and it stops soon after the end of irradiation.