Risks, possible complications 1, gastrointestinal damage: radiation gastritis, radiation proctitis, intestinal obstruction, may appear abdominal pain, abdominal distension, constipation, diarrhea, nausea, vomiting appetite, decreased food intake and other discomforts; 2, liver damage: abnormalities in liver function, radiation hepatitis, radiation hepatic necrosis, appetite loss, anorexia and other discomforts; Li Guanghui, Department of Oncology, Xinqiao Hospital, Third Military Medical University 3, Urinary system damage: abnormal kidney function, radiation nephritis, radiation cystitis, bladder hemorrhage, perforation, spasm, urethritis, urethral stenosis, obstruction, etc.; 4. Systemic reaction and hematopoietic system damage such as: fatigue, loss of appetite, nausea, vomiting, bone marrow suppression, etc.; 5. Skin and muscle damage: skin erythema, desquamation, oozing, pigmentation, vesiculation, even the formation of sinus tracts, etc., muscle fibrosis, atrophy, 6, spinal cord damage: radiation myelitis, resulting in limb sensation, motor dysfunction, etc.; Precautions 1, relaxation, calm breathing, maintain the position and positioning consistent; 2, half an hour before radiotherapy into a small amount of food; 3, if the amount of food is small, can be small meals, to ensure the supply of nutrients; 4, weekly recheck the blood routine, such as anomalies, timely treatment; 5, protection of irradiated field Protect the skin of irradiation field, if skin injury occurs, don’t touch it with your hands; 6, high protein, high calorie, high vitamin diet, if diabetes, hypertension, liver and kidney insufficiency, then it will be a specialized diet; 7, if there is any discomfort, inform the medical staff in time to deal with it.