Sequelae of nasopharyngeal, oral, eustachian tube and skin after radiotherapy for nasopharyngeal cancer are usually not lifelong, and patients will return to normal some time after radiotherapy. If patients develop sequelae of parotid gland and skull base injury after radiotherapy, they may be lifelong. After radiotherapy for nasopharyngeal cancer patients patients will have nasopharyngeal sequelae such as nasal congestion, sore throat and nasal pain. In addition, patients will have sequelae such as oral ulcers, oral pain, oral inflammation, difficulty in eating, dental caries, or the skin at the radiotherapy site will have hyperpigmentation, desquamation, lymph node edema. In addition, radiotherapy for nasopharyngeal cancer patients will also damage the eustachian tube, and the patients will suffer from sequelae such as secretory otitis media, hearing loss, tinnitus and so on. These are short-term sequelae caused by radiotherapy for nasopharyngeal cancer patients and will not accompany for life. Radiotherapy for some patients may lead to weakening of parotid gland secretion function, and patients will have dry mouth. Some patients will have severe headache, nausea and vomiting and other manifestations of radioactive skull base necrosis in severe cases. If nasopharyngeal cancer patients damage the brain or parotid gland in the course of radiotherapy, the after-effects caused may stay with them for life. It is suggested that nasopharyngeal cancer patients need to consult doctor in time if they have after-effects after radiotherapy, and the doctor will judge whether the after-effects will be lifelong according to the type of after-effects and take corresponding treatment measures.